if the hydraulic bellhousing has the same bolt pattern as the 55-62 passenger car bellhousing, it has the same bolt pattern as the t5. the t5 has the same pattern as a saginaw 4-speed.
thanks for your input on the hydraulic clutch. i plan to pull the bellhousing and pedals from that truck once the rain clears.
if anyone in the philadelphia area is looking for 60-62 truck parts, there are two such trucks in the yard... not much left, but there is a 235 with an 848 head, a good tailgate, and a good cab.