Not knowing the octane ratings in the Fatherland, I wouldn't want to go more than 9.0:1 on an iron-head Wedge @ 91-92 octane.
Gas stations max out at 95 octane (called ultimate102 over here).
If he could find even a set of 516 heads over there those with a little porting and 1.74 valves that would be better than the 906's , but he would need to get a piston that is closer to zero.
DO NOT HACK .087 off the deck to get those pistons at zero , it would be cheaper to just buy another set of pistons from summit and have them shipped over. Which wouldn't be a bad idea,in the long run that will save him money.
