It appears to be one of those "reverse" grind specials Dutra came up with years ago. Funny thing is, I believe even he admitted later on there were no gains. I know there have been dyno tests that prove there's no advantage.
And all the simulations I did with Doug a few years ago showed the same thing, no real advantage.
I decked the block 0.60, stock Sealed Power Pistons, took 0.010 off the head to true it up and an OEM steel gasket which gave me 8.8:1. The Oregon Cams 2106 is the best cam if you never plan on reving it more than 3500 RPM and the 819 is the best cam if you want to take away little low end and move it up to 4500. I went with the 2106. Timing is 20 degrees initial and 30 degrees all in. It runs great on any gas you feed it.
