3 different pulleys used on the 250 blowers, I have the middle generation , full spline. No key .I'm dying for a first gen pulley . Or late style shaft for the 250
3 different pulleys used on the 250 blowers, I have the middle generation , full spline. No key .I'm dying for a first gen pulley . Or late style shaft for the 250
just buy the newer shaft it's still available from holley.