take the intake off to check for/ intstall those? By the way I'm running 10w-30 as my machinist recommended for my bearing clearances. I chose to go with royal purpal.
for the one in my second post that goes in front of the distributor drive shaft on the back of the oil galley. You may not need to pull the intake if you can may be able to see it with the distributor out.
The two behind the camshaft thrust plate, you have to disassemble the front of the engine and pull off the timing chain to check it, but you don't have to pull the engine if it is not already out.