I haven’t heard of an AMC390 prop, but maybe it was made to be used with an AMC 390 engine?
AMC – American Motors Co – the car company, made V8 engines for boats back in the 1970s. Their 360, 390, and 401 engines were known to have marine applications, most or all in inboard/outboard jet boats. I don’t know anything beyond that. Don’t know if the car engine specs would be same as those used in boats.
Panther-Jet is one boat I’ve heard of.
Hmmmm…..can we can such a boat a Nash? or a Rambler?
Dave
Here is one example of an AMC in a boat:
http://www.youtube.com/watch?v=nfY6q2E_RQE