They are all the same size.
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.
Your cam bearings should be numbered in a particular order
Cam bearings, Rod and Main bearings. That will be all of the bearings required to replace when rebuilding a 350 engine.
If it has center hold-downs on the rocker covers, it's probably a roller cam.
You can do them back to front or front to back. Make sure the hole in the bearing lines up with the hole in the casting.
no
The cams interchange.
comp cams web site.
pull the cam and lifters
No it will not. A Buick and a Chevy engine is not even close to being the same. Inpossible. SORRY
Depending on what's actually stuck, you may have to pull the rear freeze plug and drive the cam out. Must have the lifters completely out of the way and the timing chain removed. If the cam is stuck to a cam bearing, driving out the cam will ruin the cam bearings, and you may have to cut them off from underneath.
Yes there is only one cam in this engine