which trans do i need

[91drag]

will a c-4 out of a 70 model fit my 66 289 or will i have to change driveshaft lenth. i have a 6 bolt bellhousing. will i need a small bell housing trans or a big bell housing trans. its all factory with a green dot c-4 cruise-a-matic .

 

[D.Hearne]

Yea, it should fit. Measure the length, but I doubt there's a change there. You'd also want to retain the 157 tooth bell.

 

[ForceFed70]

Lots of questions.

Like D. Hearne mentioned it should fit.
You'll want the Small block bellhousing. Not sure if the C4 ever came behind a big block.

 

[91drag]

i was just asking because on summit on the tci trans it says that for the 289-302 it askes if pan filled or case filled and big and small bellhousing

 

[D.Hearne]

Pan fill was the 69-later 164 tooth bell C-4 also referred to sometimes as a C-5. This is a heavy duty unit used in the bigger cars, trucks and vans. There were 3 size flexplate C-4's, 147 (Mustang II only), 157 and 164. You want the 157 tooth case fill transmission. I'm not 100% sure but you're present bell should fit it. If someone else knows, speak up.