There are a few engines around the 200 mark. For a buggy I would definatly go with a race .21 they are designed for buggys. Personally I would contace mark at powerhousercperformance.com and ask him what he suggests. He modes these engines with great success. I even send my $500+ mills to him to mod. I do know he has these nova bf limited engines that are relatively inexpensive but give him a call or shoot him a pm in the powerhouse coldfusion thread on here. Personally I enjoy os engines but there ate many many choices these days. Also what are you doing with it race or bash or both it makes a difference. Just bash I would stick with a cheap engine. Depends on what you are wanting to do with it.