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My blast weighs 385 wet. I haven't had it on dyno yet, I'm waiting to install a xb head and piston with maybe some aftermarket cams.
Matt

Did you change out the blast cam timing cup for a xb one?
Matt

The stroke is longer on the 12 than the 9 and blast. You have to use bore and stroke to figure out your displacement.

Been there, done that. The efi is real easy to tune. A stock 9 map is a real good starting point.
http://i250.photobucket.com/albums/gg273/Xbbuell/blast/blast013-1.jpg