Did a search on this and have found many different answers.
What should I run for a stock 502 gen VI.
Changing from mark IV 454 so I had mechanical.
How are the Holley pumps?

Aeromotive gets my vote.

DAVE

I use the Mallory comp 140 marine pump keeps my fuel pressure at 8psi on my blower motor

This pump is good up to 1200 HP, flows 500 Lbs/Hr at 45 PSI. Recommend a 100 Micron filter after the pump to protect injectors.

I'm running carb.

I just did the same thing (454 to 502) use holley blue w/ oil pressure safety switch.

Why blue over red.
I think the Red would be enough, no??

I used the same comp.140 pump when I had the 502 carb. GEN.5

Mallory 110 or 140. I've had no problems with Mallorys at all.
Be sure to use an oil pressure switch.
Gary

I run the Mallory 140 with no problems , although the next time I would go with a Aeromotive or Weldon.
Don't waste your time with the Holleys, in the race car day's I had nothing but problems with them. And if they worked they were noisey as hell.