I always had great results buying Shortblocks from Texas Speed or SPDC.....Both Shops are very reputable in the LSX Engine building....Also you can either buy their Heads or go with a different company like WCCH,Trick,AFR and etc...It's the same concept building these engines does not take a "Mad Scientist" to build... On My recent build, I Bought a stroker kit from Texas Speed and a set of WCCH's and had My Local engine Builder help me put it all together...Good Luck Finding your Engine