Twin engine at one time too... I will be looking at some vintage photos and original ads. Luckily those still exist.
Nope, no twin engine.. looks like a one wheel peel to me.. BUT that original motor mount (right) held a two stroke... (likely clinton 3hp)
the one on the left (the engine now sits on) is Home made to hold a four stroke.
Since it doesn't appear to be a live axle kart (the tube is too small to house a live axle from what I can see) it's unlikely a race kart..
and yard kart pics of that era are rare...
Anyways, that front end looks familiar.. I'll be browsing some pics as well;
I think we can narrow it down at least
'sid