They have issues and price is one of them but the experts about have solutions and a lot of the water cooled stuff fits the old a/c models.
what year frame are you slaughtering??
Its a 1981 husky 250 frame under the knife
theres plenty of room in these husky frames for engine transplants
you could just about squeeze a V twin in there , but all jokes a side the husky frame seems to be easy to fit different tanks , CR125,CR250 1979 , early husky tanks etc , its like they were made for engine and tanks swaps
and the frames seem to be made very simple theres only a few brackets on them not like jap bikes.
may need to start a new thread on slaughtering husky frames