measuring for shocks

I'm upgrading from slapper bars to caltracs this spring, and when I do that I'm relocating my shocks inboard. I'm going to weld a bar between my rear frame rails and use that for the upper shock mount, will my shock length change much? if it does I'm sure i'll need to supply measurements for new shocks, but what do I measure?

When doing this I do not think your location will work. The goal is when installing the shock you want to hang the rearend down and measure the total distance from the top mount to about 2 inches past the lower hole mount. What you want make sure you not doing is having the shock bottom out on when the car leaves. The reason I know this is my car was doing just take and would spin. A quick call to QA1 and I was on the path to the correct shock lenght. I ended up with one for a mopar.

The one thing you have to watch for is when you buy a longer shock the diatance for it to bottom out on the low side comes into play.

At the end of the day you want no less than 2" or you will bottom out the shock on the low side and and no less than 2 inches before the lower mounting hole.

Hope this helps

Joe