340 build

Your Pop probably had the spring seats machined for the when he did it.

It is not the oil pump but rather the oil passages that need work to move and flow enough oil at the desired RPM. The pump and main it sits on should be modified itself with some porting and smoothing out of the passage.

Look up "Guitarjones" and is oiling mod thread. The MoPar performance books will detail this as well. The stock oiling system (in total, not any one part) is good for 6000 RPM if the engine is loose and old. At 6500, it gets a little thin to say for sure if the passages are up to par for the chore.

I have take. 1 LA to 6800 a lot without issue for years while another took less RPM to make it unhappy at only 6500. My last 360 went to 6600 no problems. I pushed another 200 out of it and I paid the price.