Real quick just to confirm, the engine in question is a big block? That hpi part number fits big block engines. If so maybe look at a dynamite .21, dynamite .26, or dynamite .28 engines. Should be right around 110-120$ I have heard the combination pull start and roto starts are weak, so if possible get just pull start or just roto start. But dynamite engines are based off SH engines. There was a novorossi 28 engine but I think those were around 180$ but a really good engine.