6cyl Bellhousing interchange 66 vs 70?

[cboss70]

Hello, Sorry for the non-Shelby question but I figured someone would be able to help.  I have a 1966 mustang 6cly automatic car that was my fathers. After sitting for a year I recently had the transmission rebuilt because it had issues and when I got everything hooked up of course I get an engine knock. I have a 1970 Maverick 250 with its original c4 automatic attached to it. I know the spare engine ran good so I was thinking of mating my newly rebuilt 1966 transmission/torque converter/ flex plate/ bellhousing onto the 250.  The guy I got the engine from said that the earlier bellhousing would not fit onto the 70 engine (maybe he just wanted me to buy his transmission!).  Does anyone know if my 66 trans and parts are a direct bolt up onto this 70 250??

[OldGuy]

Your '66 transmission WON'T bolt to the new engine. The 250 cu. in. engine has the same bell housing bolt pattern as the 289 would have. That also means that the flex plate and torque converter do not bolt up either. You'll have to use the transmission that came with the 250.

Sorry for the bad news.

Frank