I am building a 46 half ton with a 235 (58-62 casting numbers) and open driveshaft. I am using Z28 rear with 3:42 gear and S-10 leaf springs. Originally it had the four speed. I understand that I cannot use my stock bell housing. I think it's the center hole diameter and/or the bolt hole configuration. I am aware that Jim Carter offers a modified bell housing that will accept the stock pedal bracket (or I can fab my own). JK advertises their bell housing as a way to add the synchonized trans from 48-64. What changes in 1965? Input shaft? Center hole? Bolt pattern?

I have a friend with a 56 half ton (V8) and he plans to change from four speed to automatic. If I remember correctly he said it is a 72 four speed and it uses the slide in driveshaft yoke. I prefer that yoke setup since the older four speeds had the yoke integrated to the output shaft. I really don't want to run a two piece driveshaft with a center bearing/slider.

Will the 72 trans bolt up to the 58-62 bell housing? I may just stop worrying about this and go find an older S-10 T5 (or four speed). With the 3:42 I may not really need the OD.

Thanks in advance for all the advice.

1946 Chevy Half Ton
('56 235, '86 T5, '79 Camaro Z28 rear end, working on the '85 Jaguar XJ6 IFS)
1976 Margay Panther X, MC91B