I got a 90 jimmy 6" lift springs with 14blt. I am running a HAD cv shaft no vibe issues but horrible angle at the rear. I see that you can get shims as high as 10 degrees. My question is I thought I read somewheres that it wasnt recomended to go more than 6" due to stress on ubolts. Is this true and also this truck is pretty much a DD with wifey and kids so saftey is a priority.. I woud like to just relocate the perches but no welder and shims would b cheaper and easier. Thanks for any input. 
