ORIGINAL: Lifer
Buy shorter standoffs and recess the carb back inside the mounting box. A common practice.
I thought about that, but I don't think the rear exhaust will let me get off that easy.
No big deal. I just need to look at the length of the 50-55cc engines before I move the firewall back. Might as well make room for one of them now. If it makes it through a season and I strip and glass it I think I may want to also go with a bigger engine to turn a 4 blade prop as well.