273 piston ring nightmare!

Hi all, newbie Mike here. I am currently rebuilding my first engine and it’s a small block mopar 273. I am reusing the pistons because they are in great shape and I’m on a shoestring budget. Here’s my problem they are marked .060 over so I tried ordering from JEGS and the ring gap is HUGE! Like 1/4”! But these are the only ones I could find.
1. What should the ring gap be for my rings?
2. Where can I buy some?
Thanks for any help!