I have a similar question. I have a topping lift for the spinnaker pole on my 1978 S2 7.3 and would like to have a foreguy as well. Any ideas on rigging the foreguy. I'm not interested in having a permanent installation (installed through the foredeck). What do you think about attaching a line side to side (via the toe rail) with a swivel block attached at the center? This would get me a better placement than running the fore guy through a block at the bow.
I currently have two blocks at the base of the mast and I'm using one for the spinnaker halyard and the other for the topping lift.
Any help is much appreciated.