Ticking lifters....seems that engine has those damnable hydros in it(?). Might be that either they weren't replaced, got a bad one or two when they were (it happens), or they weren't primed before they went in. They will theoretically self-prime under operation, but have had them not do it for whatever reason.

Would definitely be going to a gauge over the idiot light. Not too spendy to put one in...and worth every penny to actually see what's happening!

Idiot lights are justly named.