Be REALLY careful of threading the other end. Most commercial pushrods use rolled threads rather than cut threads - what this means is that the base material of the rod is thinner than the highpoints in the thread. (Material is displaced from the thread trough to make its peaks.) As a result, if you use a die to cut threads in one of these rods, the peaks in the threads are not nearly as high as they should be, and its ability to retain the clevis will be severely compromised.

A second thing to think about if you use threaded connectors on both ends (even if you do it the 'good' way of soldering on a threaded connector) - you had better make extra sure that you use lock-nuts and loctite on the ends, otherwise the pushrod can unscrew itself. Vibration causes the rod to rotate, which will make the rod screw deeper into one clevis while unscrewing from the other. If it can do that far enough, it pulls out of one clevis altogether. More than one really nice model has been lost in this way.

Gordon