I heard of a 5 bolt engine and bellhousing and a 6 bolt engine and bellhousing today. For 289 what are the application of these engines and bellhousing?
Hey I’m new to this forum. My name is Ben. I have an odd question. I have an early 5 bolt 289 and I’m rebuilding it to put in my 66 Mustang. (Did not realize this entire 5 bolt vs 6 bolt thing) Getting rid of the c4 and putting in a 4 speed manual transmission which I have. I’m looking for a 5 bolt Bellhousing which is a struggle because my 4 speed has a wide bolt pattern. Can I use a 6 bolt Bellhousing it looks like I’d just leave one bolt out(still have 5). Maybe that’s a dump question. Or is there some adapter plate for the Bellhousing?Early 289s were 5 bolt and IIRC in 65 or after they ran out of 5 bolts Ford went to a 6 bolt block and bell. fd
I appreciate the help. Not what I wanted to hear since I’ve rebuilt the engine but at least I know what I need to get now. Now I’ll just need to sell the c4 I’m replacing and get rid of the 4 speed manual one I bought and purchase a Ford Borg Warner T 10. Thanks for clarifying. Didn’t realize there was this issue until now.No, you cannot attach a 6 bolt bellhousing to a 5 bolt block. The spacing between the bolts is completely different.
Most 4 speeds built after Aug, 1964 have both bolt patterns- the narrow pattern for the 5 bolt bellhousing and the wide pattern for the 6 bolt bellhousing. My '65 built in Sept '64 came with a Borg Warner T10 4 speed and it has both patterns.
If you are determined to use your 5 bolt block you will need to find a 4 speed transmission with both bolt patterns.
That's for attaching to the early narrow pattern and later wide pattern. Has no direct relationship to the 5/6 bolt bell question, although the 5 bolt bells tended to have the narrow pattern.What about an 8 bolt, I have an 8 bolt aluminum for a 289,any idea? 8 bolt at the tranny not the motor
Why would you "need" a T10? The only reason Ford ever used the T10 was because Ford Design transmission production couldn't keep up with demand. Both were used at the same time, interchangeably, and there wasn't even a difference noted on the warranty tag on the door, so there's no way to tell what a car had originally.I appreciate the help. Not what I wanted to hear since I’ve rebuilt the engine but at least I know what I need to get now. Now I’ll just need to sell the c4 I’m replacing and get rid of the 4 speed manual one I bought and purchase a Ford Borg Warner T 10. Thanks for clarifying. Didn’t realize there was this issue until now.
I believe then I have a BW.