[MDPotter]

I did knock sensors, intake manifold gaskets, plugs, wires, water pump (or at least the gaskets), power steering pump, starter, tensioner pulley, and idler pulley. Just remember, it's a lot easier to do these things now than when it's in the engine bay. I haven't heard of oil pressure sensor issues. Like mongo mentioned, you can remove the OEM sensor and thread in a mechanical sensor to use for gauges. The PCM doesn't need to know oil pressure as far as I know. Or you can use a new oil port plate with threaded inlets to thread in a mechanical sender - I got mine from LSX Innovations.

If you're doing mods like headers or a cam swap, now is the time as well. Headers require new bolts and gaskets which eliminate any possible existing exhaust leaks or broken manifold bolts. Cam swap necessitates new front cover gasket and most of the time valve springs.