Yes that s always a consideration. Il take all the unwanted X and J's though ...I wonder how many are getting scrapped because noone around rebuilds them. I just called the machine shop guy says hes swamped and I can drop them off but no telling when hell get to them...amazing LOL! Im pretty sure Im in the ball park with my estimate of $700 get me some 2.02 J's get mey spare 340 together then I can retire :) gotta do it while I have the money LOL! He will do everything though resurface ,valve guides, valve seat etc. Plus clean them for repaint. In all actuality $700 isnt bad in 2024...