What are your intentions with the car? Budget??
For an otherwise stock rebuild, I've had great success with the generic .484/.510 lift 262/272 duration cam like the
Summit 5200 or if you want to stick with name-brand and a more modern cam grind profile, the
Comp Cams XE262 would be a good choice. The lift of both these cams is about as high as you can go with stock heads without machining them for screw-in studs, etc. Also, both use single valvesprings so your stock retainers can be used.
Add a dual-plane intake like a
Performer and a 600-
670 CFM vacuum-secondary carb and headers and that should be good for around 375hp and 400 lb/ft torque. Don't bother with the Performer RPM air gap - it is too much for your application and also quite tall so hood clearance becomes an issue.
This engine build can be used with your stock torque converter and gearing, although upgrading those will help with the grins and giggle factor at a cost of fuel economy. Chances are your car has 2.75 gears now, so either 3.00 or 3.25s would be better, but go no higher than 3.50s. Trans torque converter? nothing higher than a 2700rpm stall (any yes, you
CAN get converters for your (likely) FMX!)
Now that you have engine power, you'll need to get it to the ground, so a traction-loc (posi unit) will help with the dreaded one-wheel-peel...
See? all it takes is money...