That really depends on how much $ and time you are willing to invest to keep it in tip-top shape. I would also, while having it apart, have the cylinder head looked at and at the very least replace the valve stem seals.
I had all the work done for $2k + tax. It also included a new exhaust manifold that was cracked. It was worth it to me. I didn't have the time to do all of the work & needed the car running quicker then I could have done it myself.How much did the parts and labor cost?
Exactly what was wrong with mine. The oil rings were shot & weren't sealing at all. It just made sense to replace them all & all the rod bearings too at that point. I broke in the new rings with dino oil & changed the oil at 1k, 3k, & 5k miles after the rebuild & then switched to Mobil 1.Usually when a 4A or 7A is consuming alot of oil, it's a mixture of old leaky valve stem seals and gummed up oil control rings on the pistons that cause 99% of it. Running synthetic oil from Day 1 would prevent this but they didn't exactly have that back in the 90's lol