Topic: 289 Single Groove Crank Pulley

[mustangmann]

I was digging through my stash of pulleys, and came across a pulley that I have not seen before.  It is a 3-bolt, singe groove crank pulley, but it appears to have a reinforcement spot welded into it.  The casting number is covered by the reinforcement.  I compared it to a C5AE-A pulley that I have, which is shown in my books as a 289, including Hi-Po.  The reinforced pulley is deeper, and slightly smaller in diameter than the C5AE-A pulley.  Both pulleys have the centering ring that engages the balancer.  I do not have an original Hi-Po in my shop now to compare, and was wondering if anyone could shed some light on this?