Home built tube chassis in process

Don't want people to think I am screwing off but I am working 10 hours a day and I am married and have dad responsibilities. The other thing I am working on is suspension angles. The stock suspension is not very good at high speeds. My sons 94 Firebird handles great at 100+ and that is a strut car. The upper A arm is angled which should help with bump angles but I think it would be better straight with more caster. From what I can see this car has negative caster and should have 3-5 deq positive. Any one have any input ?