Re: HELP with 390
Did this get fixed??? I know its an old topic, but this is SOOO familiar to what I fought. The intake gasket for my application was so big there was only about 1/8 of an inch of gasket material left along the top of the ports to get a seal. AND I had some issues with the exhaust crossover ports not aligning correctly.
Ford 390 FE heads
Changing out the 2bbl for a 4bbl intake and a Demon 650 double pumper
Factory 4bbl cast iron intake manifold
Who is aware of the FT engine series? Not the Ford-Edsel we deal with here, but the Ford-TRUCK series used in 2 ton and heavier vehicles? They have a 391 cubic inch (and a 359, a 361 but NO 360 cube...strange) and that intake is what I ended up with. To get it to work I had to re-use the intake gaskets, squirt "THE RIGHT STUFF" sealant on them to ensure no leekey, and weld shut the exhaust ports on the heads because the location of the ports is dead center on the FT intake, while the FE heads are not.
Is this anything similar to what you were fighting? Oh, and as far as sealant on the intake gasket goes, I am leak free. No vacuum, water, or oil leaks at all. The right stuff is no joke, yall.