2 or 3" body lift? How much tire with 8-9" lift?

[redz 1970 K5]

My current dilemmas...

I have to replace all of the body mounts in my truck without question. I found a full Daystar poly kit for $85! Anyone have experience with this kit? I have used Energy Suspension mounts on another truck, but no Daystars...

Since I am replacing body mounts, I am going to chuck in a body lift... I usually stick to 2", but was wondering on 2 or 3 this time. I would like to do all spring, but once I go over 6" in this SWB truck, I know I am asking for it.

I am trying to stuff a 37x12.50R15 Goodyear MTR on a 15x12" MT wheel. I LOVE this setup and look and have had it before on another truck.

So, I am debating on 2"-3" body to ensure clearance of the 37's on top of a 6" spring lift.

thanks!