I build my own engs as I do all the work on my cars including the trans and rears. I do use my brother for some machine work as he has alot of machine shop machines from when he had his own shop. On my last eng I did use Dwayne Porter for my head work and cam specs. I used to like to port my own heads but not now with my bad back. And Dwayne is the best at what he does and a nice guy to deal with. I may have to have my son do work on my car as I get older do to health problems (knees and back) but I love doing all my own work as long as I can. And I never turn down advise because no matter how good you are you can always learn more. Ron