Hello! I need to order a set of header gaskets for my 340 from Remflex but there seems to be a bit of confusion regarding the part numbers.

I know that 340's have a larger port size than 318's and that the newer Magnum engines have a different configuaration all together. If you look at their web page, I think the pictures for RF6004 and RF6009 are reversed.

I spoke with one of their representatives a few minutes ago but he wasn't really familiar with small block Mopars and recommended PN RF6003 which I think is the small port 318 gasket.

Which part number gasket do I need?

Thanks!