Just to update this in case anyone else runs into this..I spoke with a tech at CPP who said that it's totally normal with those gearboxes for them to feel tight initially. He said a 500 mile break in period is typical.
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79 Firebird/`70 400 with `77 6x-4s shaved .065"/4 speed BW ST-10/Cliff Q-Jet/XE268/3.08
99 Trans Am/383 LS1/TSP headers and catback/custom grind cam/Vigilante 2500/Strano springs and Konis
08 Corvette - Base
(SOLD) 75 Corvette/L48 350 (LSx -4L60E one day)
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