The picture you have still has the quench pad on the bottom half of the cylinder as well as the two valve reliefs. I cannot possibly see how that is correct. In addition, why have valve reliefs where there are no valves?
I downloaded the picture, brightened it, shadowed it, changed contrast, and it looks to be a standard aftermarket 2 valve relief piston with a d-cup that is supposed to mirror the chamber.
Take a second picture at a different angle, if it's an optical illusion and if I am wrong, I'll happily admit it, but the goal was to help you. You should think about that before you bark back at people.
Being a smart-ass wont get you much more help here, there are many of us who have been doing this a very long time and build some very nice stuff.
Remember, you came here looking for advice, we didn't hunt you down.
Even though your response ticked me off a little, we love these engines, so I more curious now than I am am upset about your response. I am dying to see how this could possibly work.
If you have the info, tell us what pistons (part number), which heads etc.
and PLEASE post pictures from other angles if your machinist insists they are right. It seems odd to me that he would have tried all 8, all he needed to do was look at the head to see which way they go.
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 397 cid FE, headers, Street Dominator, 280H, 4 speed