Turn them so the hole lines up with the holes in the block.
NO YOU CAN NOT. It will not lube the engine bearings.
It depends if you have enough doom to pull oil pan out if not you have to pull motor
Specs for main bearings on a 2003 Chevy trailblazer with 4.2 engine .
yes
Cam bearings, Rod and Main bearings. That will be all of the bearings required to replace when rebuilding a 350 engine.
Make sure the hole in the bearing is aligned with the hole in the block. Use a cam bearing installation tool to get the bearing straight.
Bearings are dirt cheap-never install a used one.
Take the crank to a machine shop and have the main journals turned to accept 350 bearings. Might be a good idea to have it balanced while it's there.
Cam Bearings
yes you can
where is crankshaft position senor on chevy 3500 8.1 engine
Yes cam bearings can spin and block the oil gallery holes, therefore stoping oil from getting to the top of the engine.