how to weld on leaf spring perches

[Project86]

I really want to flip my axle on my 86 when I get home.

I'm looking at a set of perches however I see many different kinds.
Where is a link to one's with three pin holes drilled in them for proper placement of the axle within the wheel well?

I have access to a welder but the above question stumps me?
Is resetting pinion angle necessary?
Posted via Mobile Device