Big block head gaskets ?

Haven't done anything major on a motor in 20 years.What is the go to other than the old Felpro 1009 head gaskets for an aluminum headed 440? Swapping heads and cam from stock edelbrock heads to cnc ported 440 source heads.

I see 440 source's is .051 thick and the fel pro is thinner (preferred).

Need a head/cam gasket kit and everyone has them.Kit form would be a plus.What are you guys using these days?

Thanks in advance.
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