Since there is a remote shifter on this car, it cannot be a problem in the tranny. Look at the bottom of the car and make sure the levers are not hitting anything. A misalignment of the tranny in relation to the tunnel of the car could cause fouling problems for the shifter. Also look at the shifter. There is not much to go wrong in them....lube or the shifter bushings might be to blame.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.