76Impala 5/23/2011 at 3:01 PM This is an awesome article. I am planning to do the same to my B-body 76 Impala Custom. Mostly the back end of things.I have upgraded to a 400sbc bored and stroked to 434 cu.in. with Dart Pro1 Aluminum heads and a 700R4 tranny built to handle the 500hp mouse.Now I need to get the rear end to stay planted on the ground.Installed a set of Moog Cargo Springs and Competion Engineering adjustable Drag Shocks.I found a set of Upper and Lower Control Arms (MCA0013 and MUC0013).But am wondering if when adjusting the control arms to center the 3.73 POSI rear end, will I have to move the spring mounts to a different angle?Any help would be appreciated.