I've decided to get my original 289 Hi-Po engine out of my '66 GT-350 rebuilt that has been in the corner of my garage for some 15 years rebuilt. I've been asking all my car friends on how little or how far I should go on the rebuild, refresh to Stroker? So after the smoke cleared I'm going to stay with original as possible with some minor internal upgrades. Port & polish heads, roller rockers & hydraulic followers, forged pistons & balanced. I don't plan on tacking the car so I don't need a lot of HP. Any one have some other recommendations? I'm thinking of Keith from Precision Machine do the work.
George J
If it were mine, I would forget the port and polish and hydraulic camshaft. You can EASILY de value your engine by porting it. NOTHING sounds better than a solid lifter hipo. I don't consider a hydraulic camshaft an upgrade-especially to a hipo. It ain't a hipo unless it sounds like a hipo.
Quote from: OldGuy on October 17, 2024, 08:04:57 PMIf it were mine, I would forget the port and polish and hydraulic camshaft. You can EASILY de value your engine by porting it. NOTHING sounds better than a solid lifter hipo. I don't consider a hydraulic camshaft an upgrade-especially to a hipo. It ain't a hipo unless it sounds like a hipo.
Amen to that. When I drive up to my weekly gathering of hot rodders, they always remark on the unique sound of my solid lifter engine. Nothing sounds like a hipo!
If it was rebuilt and sitting in a corner for 15 years it should be fine. I'd even consider not even dropping the pan if it's got less than 10,000 miles on it. GO AS STOCK AS POSSIBLE. You don't need to reinvent the wheel.
If you stick with a flat tappet cam (Solid or Hyd) plan on using oil with zinc or get zinc additive.
Quote from: greekz on October 17, 2024, 08:18:23 PMQuote from: OldGuy on October 17, 2024, 08:04:57 PMIf it were mine, I would forget the port and polish and hydraulic camshaft. You can EASILY de value your engine by porting it. NOTHING sounds better than a solid lifter hipo. I don't consider a hydraulic camshaft an upgrade-especially to a hipo. It ain't a hipo unless it sounds like a hipo.
Amen to that. When I drive up to my weekly gathering of hot rodders, they always remark on the unique sound of my solid lifter engine. Nothing sounds like a hipo!
+1
+2
+3
Quote from: OldGuy on October 17, 2024, 08:04:57 PM. You can EASILY de value your engine by porting it.
I suppose if your referring to the possibility of "holing-thru" the casting, I can understand your perspective; otherwise if the porting work is executed properly, even if done conservatively so as to reduce the likelihood of failure, I really feel that this can be of a significant value enhancement for those whom really want to drive and enjoy their car in a spirited manor. :)
QuoteI don't consider a hydraulic camshaft an upgrade-especially to a hipo. It ain't a hipo unless it sounds like a hipo.
Now here, I just can't disagree. After all, having the "Hi-Po" and not having the "clickety-clack" sound from the valve-train just doesn't seem right, something would be missing. ::)
Scott.
Quote from: pbf777 on October 18, 2024, 10:42:56 AMQuote from: OldGuy on October 17, 2024, 08:04:57 PM. You can EASILY de value your engine by porting it.
I suppose if your referring to the possibility of "holing-thru" the casting, I can understand your perspective; otherwise if the porting work is executed properly, even if done conservatively so as to reduce the likelihood of failure, I really feel that this can be of a significant value enhancement for those whom really want to drive and enjoy their car in a spirited manor. :)
In the Used Parts World, stock (non-ported) heads are more desirable for the perspective buyer than the ported units. So many heads have been ruined by amateur porting and it is difficult to determine a performance-enhancing port job versus potential junk by looking at them.
I think that a better option would be to purchase a set of performance heads. Generally speaking, these heads will out perform posed originals.
Quote from: pbf777 on October 18, 2024, 10:42:56 AMQuote from: OldGuy on October 17, 2024, 08:04:57 PM. You can EASILY de value your engine by porting it.
I suppose if your referring to the possibility of "holing-thru" the casting, I can understand your perspective; otherwise if the porting work is executed properly, even if done conservatively so as to reduce the likelihood of failure, I really feel that this can be of a significant value enhancement for those whom really want to drive and enjoy their car in a spirited manor. :)
QuoteI don't consider a hydraulic camshaft an upgrade-especially to a hipo. It ain't a hipo unless it sounds like a hipo.
Now here, I just can't disagree. After all, having the "Hi-Po" and not having the "clickety-clack" sound from the valve-train just doesn't seem right, something would be missing. ::)
Scott.
plus one on both points.
+4
Keep it stock with a solid lifter. Go crazy or in between on another engine.
Best of luck.
Cory
Quote from: OldGuy on October 18, 2024, 02:47:17 PMIn the Used Parts World, stock (non-ported) heads are more desirable for the perspective buyer than the ported units. So many heads have been ruined by amateur porting and it is difficult to determine a performance-enhancing port job versus potential junk by looking at them.
No argument here! :)
Heck, I just finished up fixing (sort of) a set of Cobra Jet (429/460) aluminum castings suffering from a "ya-hoo" porting execution; but hey, the customer got 'em for cheap.............I wonder why! ::)
But the O.P.'s statement was that he was doing this for his personal use, as for a running and functioning vehicle, so once bolted down where's the visual issue? ??? And for any performance applications the stock 289 head ports really are just too small/restrictive and even just a little improvement goes a long way on this one. ;)
Just try to avoid turning your nice Hi-Po heads over to some of the back-yard or youtube equivalent experts.
Scott.
Well guys, I appreciate all the advice. A lot to thinks about. I've neglected to mention that I've own my GTH 350 for 47 years now and it's a driver. With all due respect I can appreciate originality but at 77 (today, 19th) I'm not into adjusting valves any more just to hear the "clitter-clatter of the valves. I would like to do some head work to make it "breath" better, but there's only so much you can do with cast iron heads and keep it looking original (I do want to keep them on). This car is not original-original. When I got it was flat black with no strips, with a 4-speed (number would indicate (2304) it had an automatic its has a 5 speed in it now.) I had already purchased blue & white paint. While stripping the body I did find gold under the bumper. So, I drove it for many years that way until I got rear ended (very, very minor) but it was time for new pain anyway. I always liked the Green/gold combo, so that's what it is today. If you're ever down here in Monterey you'll see it driving around town; it's no fun parked in the garage. George PS; thanks again for your input.
Quote from: George J on October 19, 2024, 05:57:14 PMWell guys, I appreciate all the advice. A lot to thinks about. I've neglected to mention that I've own my GTH 350 for 47 years now and it's a driver. With all due respect I can appreciate originality but at 77 (today, 19th) I'm not into adjusting valves any more just to hear the "clitter-clatter of the valves. I would like to do some head work to make it "breath" better, but there's only so much you can do with cast iron heads and keep it looking original (I do want to keep them on). This car is not original-original. When I got it was flat black with no strips, with a 4-speed (number would indicate (2304) it had an automatic its has a 5 speed in it now.) I had already purchased blue & white paint. While stripping the body I did find gold under the bumper. So, I drove it for many years that way until I got rear ended (very, very minor) but it was time for new pain anyway. I always liked the Green/gold combo, so that's what it is today. If you're ever down here in Monterey you'll see it driving around town; it's no fun parked in the garage. George PS; thanks again for your input.
Maybe we will see it next year during the Historics before the SAAC convention ;)
Quote from: 6s1640 on October 18, 2024, 04:02:23 PM+4
Keep it stock with a solid lifter. Go crazy or in between on another engine.
Best of luck.
Cory
Agreed.
Quote from: George J on October 19, 2024, 05:57:14 PMWell guys, I appreciate all the advice. A lot to thinks about. I've neglected to mention that I've own my GTH 350 for 47 years now and it's a driver. With all due respect I can appreciate originality but at 77 (today, 19th) I'm not into adjusting valves any more just to hear the "clitter-clatter of the valves. I would like to do some head work to make it "breath" better, but there's only so much you can do with cast iron heads and keep it looking original (I do want to keep them on). This car is not original-original. When I got it was flat black with no strips, with a 4-speed (number would indicate (2304) it had an automatic its has a 5 speed in it now.) I had already purchased blue & white paint. While stripping the body I did find gold under the bumper. So, I drove it for many years that way until I got rear ended (very, very minor) but it was time for new pain anyway. I always liked the Green/gold combo, so that's what it is today. If you're ever down here in Monterey you'll see it driving around town; it's no fun parked in the garage. George PS; thanks again for your input.
A Big Plus UNO
Enjoy the ride !
Quote from: George J on October 19, 2024, 05:57:14 PMWith all due respect I can appreciate originality but at 77 (today, 19th) I'm not into adjusting valves any more just to hear the "clitter-clatter of the valves. I would like to do some head work to make it "breath" better, .....
In that case I would not modify the original (VALUABLE) parts. Grab any good 289/302 block and some aluminum heads that will already breathe (good port guys are hard to find and expensive) slap a hydraulic roller cam in it and enjoy the ride. You could even use your original block and crank so get the hipo dampner. Paint hides the sin of aluminum heads....