Engine sputtering at about 65

AJ/FormS said

Oh jeeprs, that's the minimum, there is nothing to stop you from testing at a higher rpm,lol. I guess I should said that. I'm not big on throwing parts at a problem. But if it's a Holley,I would check the manifold vacuum, at the point of the problem, and throw a new PV in it...........of course I have a tester for that............
For me, the testing is the fun part.

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It is a Holley, a 650 with a manual choke not sure of the exact model. So, I've had quite the day of this, the first pump I bought went in but did absolutely nothing, so I went back to the parts store to swap it out. Grabbed some additional fuel line because the line bridging from the steel line coming up from the tank was dry and cracked on me twice just putting it back together. Come to find out, the line to the filter and from the filter to the carb were 3/8, not 5/16 as is proper, so I'm sure that was part of the problem. I got her running but when I got back from the test drive and the headers were good and hot, the line running to the inlet of the fuel pump had started leaking because I didn't tighten clamp down enough on it. Now to wait for the headers to cool a bit and I'll go and tighten it down again. It ran like crap so now I'm wondering if the timing is all out of whack now.