solo racing an early A

Hey y'all. I have a 65 valiant that I want to set up for autocross/solo racing. The best I can figure right now is that I will be competeing in the "street prepared" class with our local SCCA chapter. I need some pointers in which mods will be best to go with based on my current setup.

My current setup is as follows:
Built 318 (300-350 hp guessimate)
904 auto, column shifted
3.23 rear gear
8 3/4 B-body rear axle, NOT narrowed.
10" discs front, 10x2.5" drums out back, non-power
14" steel wheels wearing 215/75s
Factory 26:1 manual steering
Rebuilt front suspension, urethane bushings
Magnumforce upper control arms, aligned with 5.5 degrees of positive caster!
1" t-bars (worth every penny btw)
New heavy duty leaf springs out back, stock height
NO sway bars installed
KYB shocks up front, parts store cheapies out back
Stock interior, bench seats, no seatbelts (yet)

So I'm open to all suggestions to upgrade and build upon what I've got now to make this thing compete with the hondas and miatas that are dominating the tracks around here.