my vote is on the brillelli combo, personaly I like bigger but for the size your looking for that will be a nice introduction to gas you get the fuel line pump and can with motor mounts clunk filter and stopper, just add electronics, verry nice combo, I used to have a poulan 46 conversion actually I still have.... just took a pic of it.... PCM Lock @ 300 feet

When the engine ran it ran hard I always ad a bit of problem on the transition but it was a conversion.