trailing arm perches

[BK]

I got a front suspension setup and rear axle from an early 80's chevy, and im gonna swap in the front suspension soon. I also would like to do the back at the same time, and i was wondering if i should cut the perches off my original axle(its a 65 panel with trailing arm) or is there somewhere i can buy them. ALso, ill be building blocks for it, and probably weld the perches on a little different from stock to compensate for the added pinion angle. Thanks.