Using 8 3/4 with /6

Greenmachine225 said

So the suspension is something I'll worry about in the future, but what I said, "can't put the power down", I think was the wrong thing to say, what I mean is when I give it full throttle from a stop it is ridiculously slow, I believe that is because of the rear end. It is the big bolt pattern(4.5), and I'm not sure about the rollers. And yes it is a 904 3 speed automatic

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well, that can be one of two things
either there is no power to put down (it is a slanty afterall)
or, all the power is made at the top of the RPM range and the engine needs to work through the lower, weaker RPMs to get to the higher powerful RPM
a high stall torque converter will cure that, if that is the issue (a different rear end will NOT)

it s comparable to dropping the clutch at say 3400 RPM on a stick shift