Thanks for the help Jim, the allen wrench in the pulley shaft and a very long 24mm wrench on the nut and off it came. I'll be sure to keep these tools in the car. Reason for my panic in having to know how to replace a belt, I remember as if it was yesterday. The year was 1966-67 going on a camping trip with my then girlfriend, now wife Diane in my Speedster; before we got to Lancaster the first belt broke, the second in Sequoia, and just south of Bakersfield at 10 pm on the way home on a deserted stretch of Rout 99 I ran out of belts. Spent the night waiting and hoping for help, none came.....
PS does anyone need or want the official Porsche tool, a Spanner or Pin wrench designed to remove fan belts. The pins do fit into the holls on the pulley. I purchased this item from Performance Products yesterday, paid $29 plus tax. Thanks all for your help, Karl Dempwolf