I use vector motorsports out in brighton, they send it out for the machining and then they put it together, they are actually building my dart 331 setup too, the owner is a great guy to deal with and have actually became really good friends with him throughout these builds and all the tuning he has done for me on his dyno. I would always recommend them. Also have had good experience with gregg's Cylinder head in riverview he is another top notch guy.
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