Tire tuning, Not getting full tread to the ground Options

[Joe Ricard]

So I just completed my 2nd Autocross of the season. Getting much closer to the front guys compared to last year.
It seems i am not getting all the rubber to the road. More wear on outer edges than inside.
1st event I set tires at 35 PSI all around Tires rolled a bit and scuffed the outers edges more.
2nd event I set pressure at 38 psi Much faster and seemed to have more grip. Still not scuffing inner edges at all. 1.5 inches from side wall shoulder.

Car is a 70 914 2.0L carbed motor, cars Weighs 1979 pounds, Stock torsion bars infront 150lb coil overs in rear. Poly suspension bushings in rear. (fronts get it this weekend) Koni externally adjustable shock all around. Weltmiester 21mm front sway bar set at 1" from end and stock 2.0L bar in back Poly bushings both bars. Running 205/50-15 Kumho Ecsta V700 tires at full tread. 2 degrees camber all around 1/16" toe out front and slight toe in at rear 1/32" maybe.

Which way should I adjust the car? More camber? or stiffen the front bar. Currently the car seems pretty nuetral with the bar as they are and shocks set at 1/2 the range.