60's Go Karts

So, a few years back i got this sweet ass '60's go kart from my buddy Cody in Frisco.  i have ALWAYS wanted a damn go kart, from the go kart track on Vanowen in north hollywood in the 70's to drooling over the sears catalog as a kid i always wanted one.
so Cody hooked me up with this one and its just been sitting, now I cant fit in it unless i lose a buncha weight, BUT my wife fits in it and even better all three kids fit.  so it's now my mission to make it work again.  i know nothing about it 'cept that its fuckin neat as shit!  pretty sure it is set up for a McCulloch engine.  i could move the axle stuff around and put a harbor freight engine in it, but i thought it would be cool if i could find something period and neat.
and of course i'd make some ridiculous pipe and air cleaner assembly for whatever i end up with.
it has a neat little hydraulic (Fancy!) disc brake on it and i can probably fix that and other than the motor stuff its all pretty much serviceable.

and coz i'm fucked up i could get it running and put a gopro on it and stick a naked model in it and get video as she races around my complex...

SOOOO anyone got any advice or anything i might need for it?  or any info on it or whatever?