Replacing cylinder heads on a 500efi?
 

I have to replace one of my heads or may just do both on my 500efi due to water damage to one of the exhaust ports. Does anyone know the best place to get the heads? I'm pretty sure they are just GM heads with different valves, valve springs etc... but I don't know the part number or model of the GM heads. Just looking to see what the best way to replace the heads is. Also the valves and valve springs used on them. Thanks

Id check with some of the engine builders, in the wanted section, your intake has four additional bolt holes in it, so just GM shouldn't be used IMO they may be 088 heads, pull the valve cover and see what the part # is

They are GM Rect Port heads aka 088's.

Engine Quest makes stock replacement heads.