Thanks for the replies! I am currently crew (head goupie, wrench fetcher and rig driver) for a friend that races FM. I was at VIR this last weekend and just can't stand watching anymore. We were talking about a low cost way of getting me out on the track and thought maybe we could put his spare motor into an old RX7 that I could buy cheap with no motor. I'm talkin' like $500 cheap. The RX7 ITS chart shows (13 under it but the FM 13B is a 4 port engine. I'm not thinking that it will be a problem though. No one is going to protest me as long as I get out of everyones way! Later, as I learn more, I can start investing in the car more. So that's my plan, so far.

Oh, BTW, it is the old FM, not the Star Mazda FM. But it is indeed sealed.