In a perfect world you want 1-2* more +caster than the spindle's KPI. This will give the inside tire positive camber when steered, but as a consequence with the scrub radii these cars typically have you do get weight jacking. It is all about finding a happy medium and somewhere around +7-9* caster on these cars is about perfect.

OP- I agree that we need to see some pictures of your current setup as something sounds fishy.

An at-home alignment is easy enough if you can find some flat level ground. A $100 gauge , some straight edges, a couple tape measures, and some sand and you're good to go.