[GTStang]

The shifter if it is aftermarket and not stock will have 2 bumpstops(bolts). Just back both of them all they way back and see if it still pops out of gear.

I doubt this is the problem cause if he adjusted the shifter wrong you'd have problems wit 3rd and 1st. I'd think a rebuild is what your gonan find you need.

Have you ever rebuilt a manual transmission? If not it would probably be left to the Pro's also used T-5 can be had for a very good price if you shop around. If your dead set on it I can send you a PDF of the official T-5 rebuild manual. Going to an aftermarket manual would really depend on what the future of the car is. A.K.A. Do you really need it or will it just be a waste of money?

The stalling could be a lot of things. What does the car idle at?

Don't know what you mean by dead-spot.

It's cam not cams you only have 1 here pushrod powah!

B303 is not a very agressive cam and wit 3.55's should always be in the powerband. So if it really bogs I would say something not right.

Pull your speedo gear out of the tranny and tell me what color it is, maybe the previous owner did not change it to match the 3.55's. this would explian the speedo being off.

Best advice to start with would be give it a good tune-up and run codes. After that you can re-asses the situation.