I'm building an engine now. What threads should have loctite on them? I've read many times about how badly the BPs vibrate and everything comes loose.

So far I have:

Oil squirter banjo bolts (blue loctite)
Oil pump cover torx bolts (blue loctite)
Flywheel bolts appear to have loctite from the factory

Anything else? Intake manifold bolts? Engine mount bolts? Oil filter stud? Anything red vs blue?

 

IIRC the FSM calls for thread sealant, not locker, on the flywheel bolts. So what ever you use there, make sure it has thread sealing properties too. Permatex 242 or 243 should do the trick