Paul, I just viewed this but would not have responded because I don't know these guys, hence, I can't make a good recommendation. Probably what the others have reasoned. We try hard not to talk out of our you-know-what's here. I used a local machine shop for my work but wouldn't say he is great. If you want his name and number I can give it to you but he isn't an Olds specialist per-se. I will recommend this though. Over at Realoldspower.com you would probably get quite a few comments and recommendations, lots of engine builders and lots of members (in the thousands).
"The rocket 455.....it's a sledgehammer approach to a thumbtack world" LuxBlue of HAMB.