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I very much like my Doug's Tri-ys. They have nice fit for toploader and z-bar clutch. If you ever go to a cable-actuated clutch, they would have to be altered as the secondary pipe for cylinders 5&7 block the route for the cable. I paid $75 to have mine altered. The new routing is acceptable, although I still had to fab a simlpe bracket to hold the cable away from the secondary pipe.

Fitment with respec to your P/S pump is something I can't comment on, however.

Stan at Ford Powertrain can hook you up. I'm glad they were recommended to me. I have 1 3/4 long tubes for my 67 with 351W and richmond 6 spd, and no fitment problems yet.

I'll be the oddball and reccomend JBA shorties. There are no mods needed and they are built like a tank. There are cheaper, (much cheaper). brands if money is a concern. I ditched my long tubes and didn't notice any loss of power.
On a side note, did you hook the KRC up to a stock power steering system. If so, tell me about it.....what hoses did you use, pulley alignment,etc...