I usually spray little fluid film on parts that I know will sit around for a little bit. Then wipe down as I assemble. If you plan on painting and you do use fluid film, use a degreaser and brake cleaner before painting. Also, I recommend the 1 piece main seal parts stores offer instead of the 2 piece (i happen to have a screen shot on a thread on the first gen section), with part number from autozone. Intake with these engine, small blocks, etc I usually put a little rtv with my finger around the water jackets, then run the rtv on China walls. Sorry I'm blabbering its a habit. Timing cover make sure seals as coolant runs thru it, with sealant on bolt threads as well.