Fuel pressure requirments

I had a 347 built, has 430 hp on a engine stand dyno. I am getting ready to work on fuel system, What for fuel pressure do I need to carry ? going electric . also noticed the car had a line running the trans tunnel that I guess was a return or vent tube,where would this line connect if it is even needed.

 

if it's a carb, 5-7 lbs...

 

yes it is running a carb

 

Sooo if it's carbed why an electric pump with all the additional filters, regulator, etc? A simple mechanical pump will fill your needs.

 

run a stock type mechanical pump with 3/8 line from tank to pump, -6 line to regulator -6 line to carb. The carb is an 850 preform out of the box settings, feeding a RPM Air gap on top of a 347. ran a best of 6.86 @ 101 mph.

 

I have no real reason to run electric, other then I have changed everything else why stop now. LOL

 

if youre not running high hp I would recommend the mechanical I recently did an electric pump and DAMN is it noisy I can practically here it over my exhaust when running and its way back under the 1/4 panel. its a holley red pump
just FYI I wouldnt recommend for a daily or street cruiser

 

my stock Ford intank e-pump is rather quite on my street car.

http://mmb.maverick.to/threads/in-tank-fuel-pump-for-fuel-injection.75382/

 

I am hoping in the future to go blow through at about 10 psi