Hi guys,
Thanks for all the nice comments. To answer the question on the half shafts, both the half shafts and the drive shaft are from Denny's Driveshaft.
www.dennysdriveshaft.com.
The half shafts are steel 2.5" dia. and the drive shaft is 3.5" dia. aluminum.
The drive shaft will spin up to 8-9,000 RPM, and is fully balanced.
Roarvette