Here is a 1957 Fleetwin that I just got running today. I too like the Evinrude styling of this era. The only drawback for you is that it needs the pressure tank to run. However, It could be converted to run off of a single line non pressure tank by the addition of a fuel pump and a little modification of the plumbing 😉 .
If you wanted a 7.5 with built in fuel tank you will have to go for an earlier version of the Fleetwin.
