Thanks Guys, I have a 86 rearend on the shelf, was told it was different, but still not sure, have not been into it yet, have not broke in a while {knock on Wood} Hope it is a while before I have to find out, I have a 20% under drive in it now, to keep the motor from pulling down, Just what I had to do on the stock motor at 4000 rpm's in a 1050 lbs stock class.
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Donny
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