The Crane pushrods should be set at three turns from zero lash.
The trick is to get the cylinder at TDC on the compression stoke and then turn the pushrod out until you
just barely remove any slack then an additional three turns out.
If you lengthen the pushrod until you can barely turn it and then add the preload you're going to far. The lifter spring isn't very strong so you have to use a deft feel when you adjust them to zero lash.
If it's holding an exhaust valve
slightly off the seat it may still run but will overheat pronto and can burn a valve.
IMPORTANT!!!!
If the cam chest had debris from the old bearings then you will have to replace the lifters. The debris will block the bleed holes and cause the lifter to pump up and hold the valves off the seat regardless of the setting.
The oil pump is probably trashed too. The debris can also block the oil pump relief valve and cause it to have too much oil pressure ( which will pump up the lifters ) or no oil pressure.
If the bearings actually trashed themselves then the wise thing to do is split the cases and clean and inspect every part for damage. You should also clean all fittings, lines and oil tank or pan.
It only takes one tiny piece to turn that TC into a 4000.00 boat anchor.
Good Luck
Geno