Jesse Brennan
jkbrennan@worldnet.att.net

In a different world we  used a strip of teflon of the right thickness shaped like a paralelogram  to guide  6' and longer  2  to 3 inch  diameter piston rods in place  centered with out contacting a bore.   The strip was installed with the tapered ends overlapping  but not quite touching. If needed a hose clamp was used to hold the strip closed until  the strip was swallowed by the bore. The loose hose clamp was then removed from the rod. UHMW polyethylene or even strips cut from a milk bottle will probably work here.

Jesse