It would be the bolts above and below the water passages in the timing cover (maybe not all 4 of them, can't recall). You can shine a flashlight in the bolt holes, if there is "no bottom", not blind, then you need RTV. Yes, a coating of RTV on the bolt threads should be fine.

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph