I was stunned to find out that the reason my car has a Dana in it is that the original owner broke the crap out of the original 8¾ with a 383. He said he twisted the axles and grenaded the posi. It had 12.1 to 1 compression, maxed-out 906 heads, a roller cam, two Holley 650s, and no NOS or supercharger. I do not know what the HP was but he was running 10.90s at just under 130MPH launching at 5,000 RPM and shifting at a ridiculous 9,000RPM. Makes me pretty confident about the strength of my bottom end.