this is the one I used, it is for a mechanical fuel pump, it has a jet bleed, I have a 3/8 supply & 3/8 return, I also wrapped all my lines. With the ac running & 107 outside temp I no longer have any heat related fuel problems.
the Holley reg that you posted says this in the part description Notes: Cannot be used with mechanical fuel pumps.
Dang. I ordered that Holley regulator and thought it would be okay. Nothing I saw in the description gave me warning. Maybe I missed it ? The instructions in the box state just what you wrote: Not for use with mechanical pumps. I'll look at the one in that link you listed. Thank you.