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 Which Tremec were you going with? the TKO or 3550? The Tko uses a I beleive 22 tooth input shaft and different output. The TKO would come with the required yoke for the output. You would need to change the bellhousing to a SROD 4speed bell from a 79-82 Mustang 5.0 or aftermarket. The clutch disc has to be changed to match the input shaft spline count. These are readily available as this is the Chevy style. 
 
 Jeff
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