Sort of an odd application, but technically an engine swap of sorts.

I'm building a small steam powered tractor, and for the transmission I've got a T5 from a V6 camaro. This will be driven by a 36" diameter cast iron pulley. I will need to make an adapter/hub to fit the pulley onto the input shaft.

The problem I'm running into is finding any information at all regarding the dimensions of the 1"-14 spline end of the input shaft. I've been unable to find a weld on/ machinable hub of any kind which will fit these splines either. I contacted a few manufacturers who make these clutches and they were unwilling to give me any info about the splines.

Making the internal splines is not a problem as long as I can get technical specs/drawings. Does anyone know of a source for either a 1"-14 spline hub or the technical info for this spline?

 

Cheapest / easiest / safest thing to do might be to just buy a clutch disc and gank the hub out of it.