I agree with Moby, despite my non-functioning ignition transistor A cam setup ALONE without even touching the head will border on the $500 area, much less header, different carbs if you chose, yada yada. Plus the turbo will have better driveability than a peaky NA setup, and with better low end has the potential for better MPG, plus its injected.
If your 5th gear feels like 4th gear then you have the early 5 speed, 5th gear on those is .864, 4th gear is 1:1, making them so close together its hard to tell them apart.