Ok, thank you for the quick reply. For my future reference where would I find a list of acceptable engine models for use on vans aircraft. I looked on vans, would it be only the models they sell?
That's a 200HP engine. Two steps up from Van's recommended max power for the RV6. The weight is also significantly more. You will have more issues than what it's worth in my opinion. And my opinion is worth less than what you paid for it.
You can go fixed pitch, which is what I was going to do (Catto) when I was looking at the same engine for my -7A. That engine sold to another before I could close the deal, however.
I used a C model sump on a parallel valve O-360 on my 1st RV and had to modify the engine mount. It may be positioned further forward on an angle valve case but I'd be sure to check it.