Help with slight engine miss

[NoForAnAnswer]

I have a 1971 Chevy K10 with a 350/350.

Last year I put in a new (not rebuilt) distributor, new blue streak points, new condenser, new MSD plug wires, new MSD cap and rotor. Ran great.

A few months ago I overhauled the Quadrajet carb with new jets, new needles, new float, new choke pull off, new power piston bushing, new gaskets, new vacuum hoses, new fuel filter.

I adjusted it using a vacuum gauge and it read bouncing between 17-18in.

I did a complete tune-up about 2 months ago, the cap is still good, the rotor is good, the points are good, and I changed the plugs and adjusted everything.

I only got the intermittent miss on cold startup and went away when it was warmed up, then it missed a little at just idle. When I drove home from work yesterday it started missing under load, but not constant.

I went out and checked for vacuum leaks today and I didn't find any.

I use this board alot and have learned a ton just by reading. My dad bought this truck in 1983 and he gave it to me in 2000 and at first I neglected it but now I'm spending all my time and money trying to fix it up. I feel a great pride working on and driving this truck. So please help me button down this engine miss.

My dad and I know you good folks will be able to help us out.