I did catch the proto rods, I was just noting for those that thought that a shared roller would work and did not understand the conflict of rod motion.

An interesting concept. There has been numerous time that I have stood 2 blocks face to face and wondered what if. In the mid 80's I was invited to the Merc research building in Oshkosh for a meeting and while there I was asked if I wanted to see a 12 cylinder engine. I though, finally, someone had figured out a way. Only to learn it was 2 1000 or 1250's side by side with a common gear box.

Good luck with the project. I will have a dyno done shortly, should I put a four cylinder bolt pattern on the mounting plate?

Dick