Stu, When I lived in the bay area in the mid 70s I raced roundy round in Vallejo and Petaluma. One of my sponsors was Jim, the owner of the machine shop at the NAPA in Petaluma Last I heard he was still there. The motors he built for us were great. We had 0 problems with them at all. Id give him a call to see if he is still there. I had a good friend in Antiock that built engines for a living. Id highly reccomend him if he was still alive. Is Vic Hubburd still in Hayward? There was also a good shop in Walnut Creek that used to build some bad azz engines..