Heres some pics of my modified bellhousing I just finished. I'm putting a Borg-Warner T5 in my '64 F100. Lower two bolt holes already lined up. Braized on some steel to support the other two holes. Re-machined the flat face and had to bore the pilot hole out by .020". Thanks to f100parts for the bellhousing.
I'm looking to try the same swap in my 63 F100 soon, It also has a 223. Any more info on the swap as you go would be GREATLY appreciated.
I finally got the T5 into my F100 this weekend and it runs great! The first time I put the tranny up I found it needed to be about 3/8" closer to the engine for 100% spline engagement between the clutch disk and input shaft. I removed the bell housing, put it back in the milling machine, and removed 1/8" off each face (B-H to tranny and B-H to engine. I also took the steel dust cover and cut out the center of it so the B-H bolts directly to the engine. This gained me another .070" . I only took off 1/8" from each side because I felt more would make it too thin. Alltogether the tranny moved .320 closer to the engine. I also found I needed to shorten the pilot shaft about the same amount. I made a pilot bushing by boring a ford bushing out and pressing a chevy one inside it. I sleeved the snout on the tranny to accecpt the ford throwout bearing and modified the original external rods to help support the tranny. I also had to open up the inside counter bore in the flywheel to clear the springs in the clutch disk.
Great looking job. Correct me if I am wrong, but aren't the bellhousing for that motor and the y-blocks the same? I have been thinking of doing this for my model T build. I have a '55 292 out of a F-250, bellhousing, tranny and all. Only I wasn't confident in my brazing abilities though. Was considering sending my BH to Mummert for modification.
The bolt pattern for Ford trannys remained the same from '49 to about '64 or so...the assumption being that these mods would apply to any bellhousing during that time period. As always, measure twice - cut once!