We are putting together an engine with a brand new LT1 short block which came direct from GM. The windage tray is not there and no studs for mounting either. one other note, original motor was a 2 bolt main, new short block is a 4 bolt main(3 center caps).

Questions: how to move the windage tray to the new engine? 

1. Can I use the bearing cap studs from the old engine?

2. do I loosen all 4 cap bolts slowly, to remove the one which needs tb be swapped with a stud?

3. do I re-torque just the ones to be changed or touched or do I need the go through and re-torque all caps in some specific order? 

4. I hate that I must touch any of the mains, but I under stand the windage tray/baffle plate is a MUST HAVE!

Thanks for your advice.