New to the forum. 69 GMC small window cab on a 70 ¾ ton long bed 4x4

[hodge1970]

New to the forum and new to 67-72 Chevy/GMC. Had chevy cars all my life. Owned many. Up until now, I never had a truck.

Picked up a 69 GMC small window cab on a 70 ¾ ton long bed 4x4 frame a couple months ago. Have pictures and will post. Trucks rough, beds gone cab floors gone. Will need lots of donor parts. Trucks to be a father daughter build with her getting it when she turns 16.
Truck came with no front clip, engine, trans or doors. I know or found the cabs are the same, but the fenders are different. She likes the 70-72 style grilles. Picked up a 72 front clip. Question is the doors. Lmc shows 67-71 for gmc/Chevy and a 72 door for Chevy. But other sites show them being all the same. Don’t understand it there is a difference.

it has a 8 bolt 14 bolt rear and front enclosed knuckle front dana 44.
Want to move gas tank from cab to bed, have seen different modifications. Can’t remember where I saw them running it from the rear marked bed light. Will take a while but have time to get right. Would appreciate any guidance or where about of parts.