Alright im working on a 99 dodge dakota, i have put a 1974 bb 440 in it and now im trying to hook everything up but im not sure what to do about the fuel pump issue. I have the original fuel tank from the dakota and the electric fuel pump, And i have a mechanical fuel pump on the 440. basically i want to know weather its easier to use the mechanical fuel pump or electrical fuel pump.

 

You dont need the pressures the in tank pump will generate.... I would pull the unit out and see if you can 'strip' the electric pump off of it and use whats there for fuel pick/up... The sending unit is probably built in with it also... I am not familiar with the style/type of pump so it will be a guess as to what it would actually entail....

 

Thats what i was thinking but i didnt want to just go tearing things apart when i shouldn't, so ill try that and see what i can do, thanks for the help.

 

I have a mild 440 in my 68 Coronet and replaced a bad Holley Blue electric with a Holley hi flow mechanical that I bought thru Jegs. There was no noise and it worked just fine as long as I was driving normal on the street. But when I got on it, it could not keep up with the needed fuel load above 95 mph. This was with the recommended 6-6 1/2 lbs pressure. It acted like I had a governor on it. I bought a Holley Blue electric, mounted it low at the rear, insulated the bolts with shock absorber type grommets and it is quiet as a mouse and I have plenty of fuel!

 

Not to disagree with your findings, but the Electric you are using is in no way a comparison to the pump he has. Yours altho electric is still not a high PRESSURE pump as is a pump made for FI. Your problem could have been undersized fuel lines with the high flow mechanical, but you overcame....

 

With how you wrote out your build in the ablum you created on your profile, leave the in-tank fuel pump and plumb in an inline pressure reguator on the firwall near the carb.

With running one ton axles and 40" boggers, I'm assuming this isn't going to be a mall crawler. You're probably planning on wheeling this thing pretty good. With that in mind, as soon as you start to hit any angles or want/need to throttle out of a sticky situation, the last thing you want to do is starve the motor. With the in-tank fuel pump, it'll always make sure that you have gas getting the motor. The inline pressure regulator will bring down the pressure to where the carb will like it.

Also, if/when you ever decide to go with fuel injection, you'll already have a fuel delivery system in place.

 

A while back I had built a 1974 J10 with a very healthy AMC 360, built 1 tons, 40" boggers, etc, etc, etc. I ran an electric fuel pump to make sure that the motor would never not have gas. Being in a weird spot, last thing I wanted was to have the motor stop and not be able to start due to the angle of the dangle I was at.

 

thanks for the advice, also what kind of pressure regulator should i get

 

If you want to use the intank pump you can but you will need a return type regulator that will take the high PSI that that pump puts out and take ot down to 5.5 to 6.0 PSI
Holley has one that will do the job it is part # 12-841

 

We ran two new 3/8" lines and mounted a 12-803BP under the brake booster with a sheetmetal shield to protect from the exhaust. The stock pump does a good job and a constant bypass keeps the fuel very cool and should help when we get to hot summer temps.