4x2 to 4x4
 

Does anyone know if the frame rails on a 78 2wheel drive are the same as on a 4wheel truck? I have a 78 gmc c-1500 daily driver and a 75 k-1500 chassis with a bent frame. Can the 4 wheel spring hangers and cross members be bolted to the 2 wheel frame with minimal mods?

Yep, the two frames are the same part number infact!

Just make sure that you measure like 8 times, drill once, and drill straight! You don't want any misalignment in your front suspension :)

Thanks for the verification there! I thought just by looking that framerails were the same. I think if I begin by basing the front mounts for the front springs off of the core support mount holes that should be a decent place to start. If anyone out there has done this before any infor would be much appreciated!