Rob, can you list the part number for the crane replacement adjusters and nuts???
That's what we used when we did Eddie's 340. We ended up getting an adjustable pushrod, then putting it in each position 5 times with 1 1/2 threads showing below the rocker arm, then I averaged all 80 readings to get 7.219" overall length... Then did the CAD to find where the bottom of the ball in the cup would be to give the manufacturers the "ball to ball" reading...
Let's get all the info in one thread as many people like to run the stock 273 adjustable rockers on hydraulic cam small blocks...
Then maybe OE Push Rods can assign a part number and can make them available for everyone...