[blykins]

A small in/small out Toploader would hold a mildly built engine. I don't think you would have any problems.

One thing you do need to check though is that '64 Toploader is probably a 25 spline output. They're weaker than a cat's back. You will definitely need to change out the mainshaft. The current one will not last with any power.

I went this route. I got an excellent deal on a 64-1/2 Toploader....It was in excellent shape.....I bought a road race rebuild kit from David Kee along with a new 28 spline output shaft and a new input shaft bearing retainer to work with a Lakewood scattershield. I did all the work myself. You'll need a good workbench to lay out all the parts, a bearing press, and a good pair of snap ring pliers.