Well my engine fell through.
Went to get the 19.5hp engine today, the one he said "ran like a top". Got there, hooked the jumper cables to it and found that it had a frozen starter. It drew lots of current but wouldn't engage or turn the engine over. The 21hp he showed me also had starter problems... wouldn't turn the engine over even though you could turn the flywheel by hand until it got to the compression stroke. They've set outside in the rain too long apparently. He's supposed to be repairing it but I'm not holding my breath.
I'm hoping that I come across a 21-25hp engine now. I have the idea of upgrading the engine on my mower which I have always thought of as underpowered and using the 17hp Kawasaki that's on it now for the splitter.
Still driving ahead with getting the chassis put together though. I'll have the tongue on and it standing on wheels this weekend. Might even have the beam mounted if everything goes well. I'll post pics as it comes together.
Ian