Welding new spring perches onto a Ford 8.8

Hey how's it goin, I'm putting a Ford 8.8 into my 64 barracuda.

Why? Because I've read a ton about it on here, and it only cost me $150! Complete in great condition!

31 splines 3:73 gear ratio Limited slip disc brakes!

If anyone can give me some pointers as to how to weld on the new spring perches that would be great! Not sure if there is some sort of pinion degree that it needs to be at.

-I have already had the longer side narrowed to the size of the shorter side.

Thanks!