The Auto Value on M59 just west of Hickory Ridge Road has a good machine shop attached to it. The machinist name is Matt. He has torque plates for Pontiac. He machined the block for my Olds W30, a friend's RA IV and several other high performance engines for friends of mine.
https://www.myautovaluestore.com/loc...d-mi-48380-121
The guy who built my W30 and the RA IV among other engines is in Hartland. I can PM his information if you like.