I bought some used planes and one of the engines is a .60 size w/ a perry carb and a weird looking muffler. It's made in US and has no name on it. It does have a big K that's on top of a vertical chevron (like this >

Any one know what make it is?

Sounds like you have a Kraft 61 engine . Built by Phil Kraft who made radios at one time . World class pattern flier. This engine is still being made by RJL Engines. Still one of the better 60 size engines in my opinion. MAX H.

Thanks Bigmax

The RJL versions don't have the Perry carb but the "K" engine is a real nice 61 that you will enjoy. There was also a Kraft carb on them too.

Jim