Yep...the Mini-HEI is going on after the initial run-in with the stock intake/single Holly/Weber and distributor. I've got them dialed in so will take no chances with cam problems and seating the rings.
Was wondering Jerry, if you were running the stock cam in your 57, headers, and which intake?
I don't think engine vacuum is going to be an issue as everything in the head is getting replaced and I'm going to use the "no gap" rings....hope they prove to be worth the extra coin. However, I'll make sure that Tom gets me the correct gaskets for the Offy setup.
I appreciate both your responses.