360 stock push rods length reusable

According to his numbers, he is positive @ .009.
(Longer length, an amount not to worry about, or even talk about.)
Actually, he is about .015-.020" long just based on the gasket change and milling. But that assumes the valves have not been sunk due to a valve job. So not 100% known.....

BTW, OP the torque on the shaft bolts is 15 ft-lbs. But for this, just snug them down.