273 Pushrod length

I put a hydraulic cam in my 273 many years ago, so I can confirm that the pushrod length will be different. I just dug up the old invoice from 1983 (!), and I used Crower 70174 pushrods. Hope that helps. Here's the link for Jegs:
http://www.jegs.com/i/Crower/258/70174-16/10001/-1