HI thanks 4 all the good info u guys give me on this site ,i have another problem i have a zz454 which come with eledbrock RPM alloy recoval port heads i brought felpro blue oval port intake gaskets which overlap the ports on these recoval port heads only buy a small amount so i just bolted on my airgap rpm intake and used them i have brought a single plane intake now which im going to install soon and want the correct recoval intake gaskets ,who makes them and what part num are they hopefully someone can help me i cant find them listed anywhere thanks

Well that gasket fits the intake anyway, so it's not really overlapping the port opening. Just use a gasket for rectangle port heads if you want.

What application,rpm range? Why swap to a single plane? Do you drag race it? I would gasket match the intake at least. I think I used the FP 1210. I've got a Victor JR that I may or may not swap back on to mine, tried it last year, with a loss in 60ft, e.t., and a slight gain in mph.

I've tried many different gaskets on the roval port Edelbrocks and the only ones that really fit right are the GM gaskets off a 502/502. You can get them at any GM dealer but they are pricey. List is $45 or so.