HUNTER'S 1978 GMC C15 SIERRA BUILD THREAD
Next, we decided to fit the transmission and get our holes cut and lined up. Thinking on it now we probably should have done this BEFORE painting the frame as lifting a cast iron block in and out of the truck was not fun. The transmission fit really well with the low hump floor.
Annnd.. oops. My dad took some bad measurements. We had thought the holes would be somewhat similar and would need slotted but we were horribly wrong.