Ed at Ed's Foreign Car Parts in Gadsden, AL said he does type IV motors and when he went to Raby's place, he couldn't find his machine shop turns out that Raby is an assembler and doesn't machine his own parts. I don't remember verbatim what parts that Ed said they both used, but he said the heads he uses are of high quality.
Call Ed and see what he has and can build. I have found him to be pretty reasonable. Not cheap but not too expensive. And very little ego
