my recommendations in order for the first gen CRX car:

1. Seat Time
2. Seat Time
3. Seat Time
4. New Tires to replace what you used above.
5. Seat Time
6. Rear Sway bar
7. Seat Time
8. Limited Slip and 4.93 final drive
9. Seat Time
10.Seat Time

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Tom is right. I agree with all 10 of these points. I popped a motor last year, and built a .040 over... cost is the same for a .020, gained a bit... still developing it.

Money is best spent on track time, tires, and a final drive. Unfortunatly, the final drive is the most expensive piece to this puzzle, keep your eye out for a deal. It's beter than having Housman make one for $1500!

best of luck!