1951 - 5 Window

[mongocanfly]

That is a interesting bumper..does it look homemade or what?...you planning on using it.?..
Yes mark the frame where the axle centerline is just for a reference..you may want to move the axle a little to center it in the wheel opening but at least you'll know where it was..most crossmember manufactures will give you a reference point on the frame of where to center it ,,something like.. ( measure 3.125 inches from this hole to this mark)..
on the rear get your axle in place and square..measure measure measure..when you get it right front to back and side to side up and down ..weld some temporary bracing to it to hold it in place and then start installing the 4link..what rear axle are you going go use?
Also I spy a nice lookin chevy ll..