The following is simply my opinion based on observation and information, but Mark seems to have quite a specialty in a narrow type of engine building market. I'm not saying that the man cannot build other engines, but the few combos that he usually DOES build and sells seems to indicate that his service is very specialized, and also that he very likely has those few combos that he sells down to a science, and would not be out-done by any other builder in this narrow engine selection that he usually offers.
Therefore, I'm thinking that you're probably better off by choosing one of the engine packages that he usually offers. I think that's what I would do if I were in your position. JMO.
