Check the gremlin rear end and see if it's a limited slip Dana. If it is, I would use that one. Their tough, I raced one for 2 1/2 yrs and never had a problem with it. I raced a 71 Javelin SST 360 in 1/4 mi and auto cross. It had the electric blue paint w/white stripes. How about a pic when your done with the paint?