GenVI oval intake on MkIV rect heads?
 

"might" have a line on inexpensive AS&M EFI setups but the lowers are oval port. I know it's probably been discussed a million times but what search terms can I use to read up on this oddball intake/head setup? Can I even bolt a Gen VI intake on Mk IV heads? Power goal would be say 420-450? Plan is to rebuild MkIV 454MAGs to HP420-type specs and use the EFI intake setups.

For now my cost/benefit/power comparison would be a set of used late-model 502MPIs (415hp) drop-ins for $10k or less.