Jib Traveler Cheek Blocks

I'm looking at piecing something like this together for my 16 this week. I'll probably head over to the local sailing shop during my lunch break tomorrow, since I prefer to buy local when possible.

I already have the ronstan travelers on the boat, as well as the original swivels on the cross bar. Does anyone know the line lengths/diameters as well as the part number for the cheek blocks? I also notice two extra "horse shoes" in the photo, where are those placed?

http://www.murrays.com/mm5/merchant.mvc ... gory_Code=

I think I figured everything out, except for the cheek blocks. From what I can tell, it looks like most of the "kits" use the harken 092
http://www.harkenstore.com/uniface.urd/ ... MEB9Y8U9SW

However the local shop only had one on the shelf.....so I came home with two of the 233s..

http://www.harkenstore.com/uniface.urd/ ... MEB9Y98P7W

These should handle the load, right? They look to have the same load rating as the micro blocks on the jib clew.