I think I made a mistake. If possible, I need a drop in replacement for a Fox 46 ABC BB. I don't want to mess up the mounts.  I got the new Fox 46 ABC BB for a gift. It sat around for a while then I decided to build and put it in my scratch built Pat Johnson P51 profile. On the bench, the engine ran pretty good. Very easy to start. But once installed all I can get is a dry 2 or wet 4. I replaced the factory nva with a ST nva. Different plugs, tanks, fuel line, filters, etc. This helped a bit, but still no fun to fly. Sure does burn fuel and not smooth running. On one slow flight (bird mating season in TN), a bird attacked the slow flying P51, it stated a dogfight and the bird lost. So, I had to name the P51 "Birdkiller". No damage to the plane. The bird I think flew off and crashed.
Anyway, any suggestions as to what engine would fit these mounts??
Jim

I've tried a couple of times to contact Lew with no results and I was told that he was on medical leave, but this was several months ago. Anyone have current information?