Quote:

a dana 30 was great for what it was designed for. a hemi car or a 440 six pack car is not a hd truck. ok I got you the nine inch was only good for a stock car but the dana 60 was good for cars ands hd trucks up to 4 tons. it look like the dana is better to me lol



There is not a 4 ton truck on the planet that runs a dana 60, and I would be willing to bet to that fact. It was a 3/4 ton rear. Its was more cost effective to do a dana 60 then to invest the money reengineering the 9 inch for a hd truck that all. It was a dollar amount that made that decision not a strenght issue. This is not hard to understand.
Why are you dead set on putting a heavier rear in a race car?

Brett Miller W9 cnc'd heads
STR Chassis fabraction