Rebuilt magnum 360 Noise

I definitely agree with you. Thats what I'm going to do. But the pan is getting dropped anyway to inspect the bearings. The first day it ran it had a but of a noise at idle. Its since gone away but I'm just checking anyway. Definitely gonna try to eliminate an exhuast leak though
Not saying that you don't have a rod bearing issue or that you shouldn't check it (even if it's just for peace of mind) but in my experience a noisy rod doesn't get quieter they stay noisy or get noisier. However a rod contacting something in the pan could start out noisy then get quieter as it makes clearance at the point of interference.