Comp Cams sells kits that allow you to fabricate custom length pushrods with ends that match specific requirements. Their website states that you need to contact their technical department to be sure you get the right parts the first time. When Comp was a brand new company back in the mid-1970's, my father was a field tester for them, using their experimental lobe designs in the circle track engines he was building. Two men had left Cam Dynamics to open their own cam grinding company. Their custom pushrod kits come with a set of over-length pushrod tubes, a special cutter tool, and an installation jig to put the cup shaped top piece in straight. I've used them on MOPAR engines with Skorpion roller rocker arms, and they work very well. Call Comp tech assistance to see if they sell a blank pushrod long enough to fit your engine. They're very helpful, and they know what they're talking about.
Jerry
