I need to lower my fuel pressure some more, but the screw for the regulator is hitting the bottom of the plenum so I can't back it out anymore. What should I do?? Can I just take the screw out all the way and put a shorter one in, or will this screw something up?? Thanks

 

I believe putting in a shorter one will be fine.

 

can I leave the regulator bolted down? or does it need to come off?? Thanks

 

You can leave the regulator bolted in , but the plenum will have to be removed or at least taken loose to allow room to replace the screw.

Holley AFPR?

 

no it's made by crane cams
so it wont screw anything up if i take the screw completely out ?