Fuel smoke and fouled plug

jaws said
SE if you can find a set of fiber gaskets to use with the valley pan.
Think you might have found your issue.

Fiber gaskets in hand. Two per side. Only need a smear of permatex on each one where it meets the valley pan right?

I’ll have to put a thicker bead down at the front and rear because of the fancy head gaskets but the pan should flex.