what do u wanna do with it, if u just want to rag it everywhere and like the look of a 4door, you would be better buying one with a 24v conversion like this one. http://www.pistonheads.com/SALES/1437280.htm
1/4 of the price and a spare engine, you can just Banzai the 24v all day and itl take it, they sound better than a YB.. tbh, and they look good too.
if ur buying them for the YB everything said above stands, if you go and look at one make sure the guy hasnt warmed it up before u have arrived, as u wanna see him start it up cold.