Well, this boat left the dock early on
You can catch more flies with honey than vinager.
Seeing as this is a Banshee forum, not much info here on your subject.
Welding a kit together is not the same as desining and fabricating a vehical.
I know I'm an asshole, you didn't have to remind me. But, I'm not an ignorant one
Having built a snomo drag motorcycle, I have a little insight to this problem.
Building a frame from scratch will probably be easier (and safer) than strecthing a Banshee.
The clutch shaft MUST be perfectly parralell to the crankshaft.
I would suggest using the chain case from the snomo too. Will make gearing changes easier, as you won't need a sprocket as big as the rear wheel, and guarenteed, your first gear choice probably won't be right. (experience talking) This shaft must also be parralell. No matter which way you go, you now need a custom shaft to accept the final drive sprocket, which I know you don't have laying around.
If you don't use a fuel pump you need diferent float needles for gravity flow.
If you ever get this far, you will then have the joy of tuning the clutches, as it is no longer a sled. Of corse you have a selection of weights, springs and helixes laying around
Might check Planet Sand or E2S for this type of build.
Good luck and let us know how it goes.
Will you be man enough to admit failure on here?