Big block, for sure. I like my engines to be excessively heavy, and rather wide
As for a slipper tensioner, I've definitely seen KA's tensioner and used their tensioners on other (non CB750) builds. To be honest, I have never really like the idea of a slipper tensioner (all brit bikes run like this), and have tried many different materials but have always found the wear to be excessive. It's also $150 unless you go through cyclex
TG, I've never seen a few solutions for non-750 engines, but never seen anyone try to adapt them over. A friend of mine who did a performance build on his CB did try the gear approach. He'd gone to his local gear shop, and picked up a sprocket of the same size and pitch as the CB cam chain, pressed a metal sleeve into it (phosphor bronze) and ran it instead of the tensioner wheel for the cam chain. It worked, but the wear on the cam chain was rather intense. A manual tensioner was used, and the chain was adjusted by looking at the tension under the valve cover.
I was thinking, as a first attempt, I'd just fit a teflon wheel of the same dimensions as the same dimensions as the stock one for the primary chain (I have a spare tensioner), and see if that is workable starting solution. Then one can worry about splitting that into two tensioners!
RR, It's cool that someone else is trying this as well, thanks for informing me. I understand the need for keeping it under wraps and respect that. Since this is not a big project, it should be cool because we'll likely approach it differently and can compare the solutions later!
Cheers!