I have the original T-400 stashed away in the garage. I put a 700r4 in a couple years ago. I changed the gears from 3:31's to 3:73's. (No "Crack" in this rear end.) 
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Brian
I know it's not a Chevelle. I still love Chevelles so I hope that counts for something! (70 Olds 442 W30)
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