Actually there is another source for the machine work on the Mod Motors. That is Brian at Duffee Motorsports (623) 455-8188 He actualy built the motor in my L. and when I pull the Cobra apart to put in good rods and pistons I'll have him do the machining on that also. I do my own work for the rest of it except for taking it back to Devin at PSR to be tuned.