You'd probably have better luck over at Ih8mud.com
I've heard a lot of good things about this guy from mud and would probably know of a good machine shop, http://www.torfab.com/index.html
I had called Tor already, he said they used someone called " Lynwood Machine" I didn't have any luck with that name.
I need the head rebuilt, first shop I called was not familiar with any overhead cam inline 6 cylinder engine that toyota made.
This guys rebuilt a couple of friends 80 series engines and they were really happy with his work. He would most likely know where a good machine shop for cruisers is located. www.enginehaus.com