13b rotary is a good suggestion for a fire-breathing race engine but unfortunatly i dispise rotary engines (wank wanks! ) i would rather stick my wedding tackle into a blender, if you know what i mean, but its always an option!

Gti twin cam engine i can get for $600, but i rang a few places and haven't been able to source a sierra box as yet, but i'll keep my ear to the ground so to speak, you never know i might be able to get one. I'll keep researching that option further.

A noble member on this site has offered me an A-series engine that's worked and has 120hp at the treads, that is a great option, and the easiest by far.

I'm keeping my options open and throwing ideas out there.

As for the bike engine in a 1000...... !
I have read through the site that Ianey put in his last post and i'm going to investigate it further but to be honest it's very unlikley that i'll go down that road, but someone has got to be the guinea pig! and do it so of the rest of us can follow! lol