Help me tune my 69' camaro ss

So recently i got a camaro ss and I decided that it would be a great car if I tuned it, so i did. The tune I currently have is wonderful except the rear tires struggle for grip at 2nd gear. I wanted to know if y’all could help me figure out how to correct this problem. It is rwd.

My current tune
Tire pressure:
Front-20.0 psi
Rear:-15.0 psi

Gearing:
Final drive-3.45
1st-2.89
2nd-1.79
3rd-1.49
4th-1.16
5th-0.94
6th-0.78

Alignment:
Camber front- 0.5
Camber rear- -1.5
Toe front & rear- 0.0
Front caster- 3.0

Anti roll bars:
Front- 34.21
Rear- 10.02

Springs:
Front- 1,220.1 lb/in
Rear- 883.5 lb/in

Ride height:
Front- 7.8 in
Rear- 9.9 in

Downforce:
Front- 100 lb
Rear- 200 lb

Do you really have positive 0.5 degrees front camber and negative 1.5 degrees rear camber?

l’m only practising into tuning but that seems completely backwards.

It could be let me reverse it and I’ll see what happens

Dont use positive camber at all. Keep it at -0.5 or 0.0 at most when you dont want use camber.