Let me throw in a vote for Smith Brothers. This has been several years ago, but the attitude counts.
I found out late one afternoon that the pushrods I had intended to use were not an acceptable length. I had a dyno session scheduled for mid-morning the next day and we were doing the final assembly. I took a tubing cutter and cut a small section out of the middle of one PR and then tapped the insides of the two end pieces. Used a cut-off bolt and a pair of nuts and made an adjustable-length PR to be able to ascertain the length I really needed.
Called Smith Brothers and explained my difficulty.
They made a set of push-rods the length I needed and overnighted them to me. We had the engine running on the dyno before noon.
For what it's worth, when you are putting an engine together for the first time, the tolerance stack-up on the various pieces can be such that you literally can't know about such things as push-rod length until the last minute.
Due to the above, my first choice will ALWAYS be Smith Brothers
KS
