No. It's a slant six thing. Or rather a Doug Dutra thing. He's come up with several reverse duration and total reverse grinds for the slant six. He ultimately found though that there was little to no benefit, IF I remember right. Erson picked up on one of the grinds and I think this 346 is one Ken decided to include in their list for the slant guys.
It's a decent enough grind. I like the low lift. Will take a single spring like the Comp 901 with no head machining. Will be nice and reliable with very low stress on the valve train. But with that 106 LSA and those pretty big duration @ .050 numbers, it's gonna have a pretty good lumpy idle. Might be what you want, so go for it.
