Help: Clutch not fully disengaging

[Pranav]

I'm baffled by this one on my LT1 t56 car.

Replaced the motor.

Flywheel, PP, clutch disk, throwout bearing, clutch fork, and trans were all 100% OK and untouched when I swapped the motor, didn't even resurface the flywheel. I put the engine/trans package together on the garage floor and put it all in the car, noticed the pedal was stiff but still had full travel.

The clutch fork just sits loose in there (after clipping it on to the TO bearing) but tightens up once I get the slave cylinder bolted in place. On stands I cannot easily get the car into gear, and once I do with the clutch all the way in, the driveshaft/wheels spin. I notice if I take the big aluminum clutch slave/fork cover/spacer/block out from between the slave and the bellhousing and simply tighten the slave cylinder down further, I get full engagement.

I did also go ahead and pull the trans and took the clutch/pp/to apart and put it back together again, it is all torqued on straight. I've tried bleeding the slave/master multiple times, might try swap the pair out with a spare that I have on hand to see if that does anything. Driveline is also not making any funny noises...

Do I just need to find a longer clutch rod? I've also heard of removing the pivot T bolt and shortening it as being a solution. Not thrilled about pulling the trans a 2nd time but I gotta do what I gotta do. Thoughts? Any of you LT1 guys run into this on clutch swaps?