65 289 block?

[gt350hr]

   John ,
        The 1-4 caps are virtual duplicates of the originals , no problem there. What ISN'T reproduced is the rear cap which carries a C3OE casting number rather than a C2OE casting number common to the non HiPo blocks. Function wise there is no significant difference , the likely reason that cap was not reproduced.  If (IMHO) you use the caps for the reason they were created ( to add strength) and not to deceive , all is good. BUT many are "making" HiPo blocks out of "regular" ones and passing them off as genuine. Same for those who use Mexican caps.
    Randy

[acman63]

Not all rear Hipo caps have the C3OE  casting numbers either, I believe this was probably something that the earlier cars had.  last 5 GT350s  66s and 67s Ive pulled apart had no numbers on the rear cap

[camp upshur]

Here's a 271 #5 and a non271 #5.
Anyone got a pic of a Mexican #5?

[gt350hr]

  Jim ,
      I have also seen a couple of the no number caps too. Those no number caps are usually associated with Boss 302 rear main caps and are nodular iron material per the Ford print.  Point being that a C20E numbered cap is from a "regular" 289 and is "grey" iron . One should always be suspect of a  "hipo" with "cross hatch" honing marks on the mains. Ford "line bored" the mains and the machining marks are circular.
    Randy

[2112]

@wcode70

have you had any luck getting your 429SCJ Mach I back?

[wcode70]

@wcode70

have you had any luck getting your 429SCJ Mach I back?

Sent you a PM.

[2112]

👍 I responded