Usually theres a info sheet with the rings that gives you a formula to achieve the proper end gapsper bore size and application I.E>N/A nitrous, blown, turbo.
On my stroker 496 BBC N/A.
I came up with .022 to .024 on the top rings and .024 to .026 on the second ring.
Whatever you end up with the second ring will always be wider by at least .002 over the top.
Oil rings usually come pregapped even in file fit packs, but its a good idea to check them anyway, they should be around .035
Cp