For NA you can drop the rings right in.
Theyll hold 500 without issue.
Youre gonna need a larger cam and better than stock intake for 500. And some nice heads. The trick flow 225s should fit your purpose. The 220 as cast just lack the extra flow.

 

do you guys sell those pistons separate or just in the rebuild kit? I can’t seem to find the item number for them?

 

We do, they just arent on the site yet.
They run $300 with rings.

 

last question, what brand rings are included?

 

Hastings