Jerry,
Thanks for your quick reply. I was slow to respond due to not being able to log in officially until resetting my password. Still learning my way around here.
I stopped in at FLAPS yesterday to check out the 250 HB and determined it was not gonna work for me since the hub measured too short to seat on the timing cover seal.
Ordered a SMC HB from a 70's 350 and it will be in tomorrow, (Thu), morning. Hoping this will be what I need. It looked long enough in the photo, (again no quoted dimensions), to reach beyond the seal in the timing cover. Will need to order the correct pulleys to make everything I want to add line up if it all has the right dimensions.
Any suggestions or warnings?
Thanks