71 gmc on 77 frame??

[browndawg71]

im new to this board so this question may be asked already but i will ask it anyways.has any one on here put a 67-72 on a 73-87model frame(4x4) if so i would appreaciate any feed back.i am contemplating this on a 77 3/4 ton 4x4 with 400/4spd . i work in a bodyshop so no frame sectioning scares me . oh , both trucks are longbeds . i havent measured wheelbase yet , i thought this would be a good place to start investigating. any input would be greatly appreaciated.