One of my favorite motors. I have a few of these:

1969 Johnson 55 hp short shaft
1973 Johnson 65 hp long shaft
1975 Evinrude 75 hp Hustler short shaft

It really is too bad these motors have been droped. Just about everyone at one time or another owned one of these motors.

My experiences with these have been:

They run best "pinned"
They will run forever DO NOT FORGET THE OIL
Not bad on fuel
They will need a head gasket every 10 years or so.
A coil and power pack now and then
Will run like a watch when properly tunned

I do know where there is a new 2001 70 in the box HMMMMMMMMMMMM!