Iron Ram heads from Hughes
I believe there is a place that will assemble them with 3.1L V6 springs and ship them complete for under $1000. Hughes sells the same EQ head everyone else does. They come bare. Using the magnum valves you are limited in lift to under .450 or so. By using chevy valves (cheap too) you can run a better spring and get up to .550 lift. The heads for me to get are about $300 each bare. They move some air, and they have nice chambers too. The castings are very nice. I have seen several Modified Tour (cam restricted) 360 2bbls on the dyno surpass 460hp with them in stock form. They can make power, but on a 4" stroke IMO they limit the cam to too small for my taste. I think $1024 plus retainers, locks, and springs, plus $80 to order the LA pattern heads, is frankly robbery for a stock port EQ head.