I know this is prolly useless but thought I would give it a long shot. I had my pistons already but when the machine shop went to do the finish hone on my block they found a hot spot they had to get out and had to go to far for my pistons to work. Now I am facing buying a new set of custom A460 Pistons. My finish bore is 4.615, 6.7 Aluminum Rod, 4.50 Stroke, and the compression height for a standard deck and they have to be for nitrous. The pistons I have are diamond and are for above with a back cut .043 top, D Wall Second, and standard oil, 4.596 in size, flat top, gas ported, with A460 Valve Reliefs. I will take 400 or best offer if anyone needs them. I can get pics if someone is interested.