Well, started sizing everything up.
First thing I noticed is that with the engine placed where I want it to go, I'll need an even longer chain on the non-powered side of the bike.
On the powered side I'll also need a longer chain. I looked at how short the chain that came with the kit was and wondered why everyone had to run tensioners.
Then I remembered that not everyone is building something as long as this.
I can sort out small stuff right now, but I think I'm going to ditch the rear coaster setup in favor of a disc brake conversion.
Will also put a disc setup on the front.