I never have used paper gaskets either. I do use a thin coat of Hylomar Blue sealant around the ports on both sides of the valley pan. The Hylomar stays sort of soft and isn't affected by fuel.

68 Road Runner (383/4speed, post car w/decor pkg) - Major Project
69 Road Runner w/472 Hemi & 4 speed.
70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project
2023 Ford Mach 1