Moving rear end back

1" inst going to be much to do anything to effect spring ride etc.. its the length of your thumb from knuckle to nail tip usually. that isnt as much as one thinks it is. one should consider traction bars over a snubber in any performance minded setup no matter what. because it controls the actual spring wrap personally not the center of the pinion nose. makes a massive difference and can be more controlled and consistent. im sure old guys will argue and i understand as the snubbers work but have limits. its just not 1068 anymore and technology has moved on beyond, way beyond.

It's something you'll have to try to be sure of. No doubt considering GM cars run a pic centered on the spring that it can be made to work no matter what.

I don't run a snubber. I just left the springs clamped in the front and cut the clamp off the rear. It dead hooks but I'm only making about 500hp at the crank. Maybe with more it wouldn't.