Re: Tension and Tighten project
You might be able to adjust the engine chain length by adding or removing material from the rear mount.
Cutting the stock rear mount block shortens the chain
Adding shims lengthens it.
I'd try adding some shims first to avoid cutting anything, it doesn't take much to give you another link. I think it's a much better way to adjust your engine chain length without a tensioner than using half-links which are considerably weaker.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.