I just got of the phone with the machine shop, I have a set of J's with 2.02s there. i gave 200 deposit, and paid 280 shipped for the heads 2 or 3 years ago... hes saying for everything 450 so, 650 plus 280= $930 worth it ? its up to the person. Also, these days thats the price today who knows next year or 2027...:)