Quote: Amazing thread guys. The 68 Hemi RR will be the top dawg soon enough, as soon as he loses the heavy dana 60 and puts in a lighter 8 3/4.
I would be very surprised if he saw any ET difference from that swap. I have done the Dana to 8 3/4 swap on 2 different very consistent cars, and neither one picked up anything at all. One of them was a Dana with a factory sure grip unit, to an 8 3/4 with a spool, same gear ratio in both. No ET change at all. If I remember right the 8 3/4 was almost 80 pounds lighter too.
Never saw any gain from this. In fact, Eds 6 pk FAST RR was actually slower with the 8-3/4. And managed to twist the stock 8-3/4 axles with the bias tires...
