You should make some 20r efi conversion intake manifold plates I know there is a demand for those

Where would you possibly get that idea?  Only problem I see is can you cut aluminum with a plasma?  I don't think a steel adapter would work too well between an aluminum head and manifold, but if you could cut aluminum then.....

And is the FROR tcase mount the one that mounts to the back of the case?  If so, build em and sell em here cheap.