Can anyone tell me what parts can be utilized to put a C4 behind my 221sp which is now a 4 speed? I'm in the U.S. and don't know what 200 or 250 parts might crossover. Thanks, Cliff.
Use the Australian C4 cast iron bell housing and the right pan fill gearbox from any US C4 automatic.
Ford Australia has call system for C4s; an internal date code, C8, C9, and C10.
C8 is 1968 221 Ford Fairlane, Fairmont and Falcon.
C9 is 302 Windsor V8 C4.
C10 is the US Cleveland 351, but used on the 302C engines.
What you are looking for is a C8 cast iron bellhousing.
If you would like, I can make you a Bellhousing adaptor like I used for for David McNair. He supplied six Caterpillar 7/16 bolts, and I made a crank spigot and an iron 15.9 mm deep adaptor adaptor.
That allows you to use a C4 Small block Ford 302 gearbox.
In the USA, Californian 67StraightSix made one for his turbo 3.3 Mustang.