Q: Bad lifter? on 2002 Pontiac Grand Prix

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
140K on engine, maintained pretty good, mostly highway miles

lifter just started making noise, put Seafoam in in to quiet lifter, and plan to get an oil pressure test next week. Most major items have been previously replaced except below. Both factory TSB and intake manifold leak and recall valve cover gasket leak were fixed recently.

Transmission appears strong

Below items have not been replaced yet:
Timing Chain
Fuel pump
Water pump
Serp belt tensioner

I am wondering if I should rebuild the engine if the lifters are bad or get rid of the car since it has high mileage and more will potentially go wrong. I love this car.
(1) Answer
(1) Comments
You have fixed the obvious and then some. If you are sure it's a lifter/lifters, then just replace the lifters. If you caught the intake leak in time then all you need is lifters.