I am going with a fully built engine too!!! It will be approx 3.7L with all the internals fully tweaked. It cost me $11K but I have been waiting so long that its almost paid off :) I am still looking at few more months until its done. I guess you have to wait for all the really good things. Including my prior problems with blowing up my 2nd engine and waiting for this new killer, my Z will have been down for almost a whole year! Well, wait patiently and enjoy it when you get it!