Hot Damn!
Schwinn freewheel crank arrived.
A 37 year old item in excellent condition! (1977)
No noticeable wear on the chromed teeth and no traces of rust near the bearings.
Freewheel is nice and tight and smooth ... best of all it is adjustable.
It can be tightened up after it wears a bit.
I do believe that a single chainring is preferable.
But this looks to have good potential as a double ... if I ever go that way.
Now just gotta find the "proper" bike to transform.
My Schwinn Searcher 700C, (rescue bike), looks to be the prime candidate.
14-34T 7speed looks appropriate for the 52T chainring @ 33.3V.
Steel frame gives good motor mount options.
Will probably build a cheap Mountain bike conversion with cheapo single chainring as my first testbed ... tho.