My new /6

Well, it ain't brand new..... I just bought a 72 Dart. Clock reads 65,500 miles. I almost think they could be original miles. Every Mopar I've had had some botched hacked wiring, but not this old beast. Anywho, coupla questions for y'all.

On cold startup, she rattles like hell till the oil pressure light goes out. Doesn't sound like lifters or overhead clatter, it sounds and feels like it's bottom end. Typically goes away within 5 seconds of firing up. Opinions?

Secondly, she feels like she has a surge. Almost like a fuel delivery surge, but not as pronounced. And never during acceleration or deceleration - only during straight and level flight. No matter what speed. I'm kinda thinkin maybe point ignition? I've changed out the fuel filter. Dumped a bucket of mud outta the old one, but it didn't make any difference.