As far as I know he just had to do a little drilling on the ears of the Chevy trans. to get it bolted on the Buick bell housing,even used Buick pressure plate and clutch. Buick 3 speeds have kinda a funky shifting set up that's why he went with Chevy so he could use a stick shift..As far as the torque tube set up I think he used the "bell" and the universal joint off the Chevy . I remember he told me it was almost a direct bolt on to the Buick tube. That torquie straight 8 ( it's the small one ) in that light weight truck with 4:11 gears ,,,,,it will smoke a tire for a quarter mile if you keep your foot in it !!!! If you notice in picture it has 2 different carbs. both stock to Buicks but one is a Carter and the other is a Rochester. Home made intake and exhaust with no baffeles. Sets there and idles at 500 rpm. going burp,burp,burp...He thinks the cab is an International but not sure.