What stall converter do I need?

Before you spend several hundreds of dollars on a converter...

Fine tune your combination...get the timing set...initial and total timing..

get the carb adjusted correctly...you will be surprise the different...

This x1000

That thing should KILL the tires.

If it doesn't have 16-22 initial timing, it's not close to correct.

Springs DO NOT limit the total timing. There is a way to mechanically limit it. Find out what's necessary to get it done and do it. It takes time and effort to get ignition timing correct!

A good 2500-3000 converter would be a nice piece for that build.