I may have a fuel delivery problem,and am concidering switching the mechanical pump out for an electric. The Edelbrock pump is several years old and would cost not much less than an electric(Holley Blue)The idea of the rear pump appeals to me if nothing more than making it easier for future engine pulls.May even get quicker starts,who knows.
I know most modern cars have in tank pumps,and that the Holley's are external. Is there a concern for continuous use on the street?Motors get too hot,or maybe the pump noise too loud?

Holley blue's sound like a bunch of angry beavers with steel chompers knawing on your car. Look at the Carter mech pumps. Durability of a good electric pump is not the issue, NOISE IS. I have a Mallory 140 electric pump and it has performed well, and have been told that they are a quiet electric pump. Still rather loud, IMHO. The noise of my pump goes well with all of the other racket my car makes. If your running Cherry bombs dumped under the car, have a gear drive timing set, leaking header gaskets and a valve train in bad need of adjustment, go ahead and score a Holley Blue, it will blend right in!!!:)

It seems most of the carb electric pumps use an older design that makes a lot of noise. The newer designs used for high pressure EFI pumps are very quiet. I'm running a wal-bro 255 lph electric pump with my EFI setup and it is almost totally quiet. I can barely hear it with the engine, radio and blower off. No way can I hear it with the engine running.

I think aeromotive makes a carb version of their pump that is quiet.

I have a 71 Chevelle with a Holley blue pump. I can't wait for winter to come to get that pump off the car. There is no place on the rear of the frame to mount the pump on the frame with a full exhuast system so it was mounted on the front part of the trunk pan by some genius. The pump makes it sound like someone is in the back seat with a high speed jackhammer. I since remounted it with 3 pieces of tire sidewall to insulate it from the pan and it sounds like the same guy is in the car with the jackhammer but i now have earmuffs on. It will soon be replaced with a mechanical pump. My brother has a 12 sec. 454 chevelle that is running a stock Carter mechanical pump from the local parts store and it feeds his 850 holley just fine and never misses a beat. That's what I think of the Holley blue pump. If interested, I will soon have a Like New Holley Blue Pump for sale very reasonable. good Luck

I think the Mallory 110 is a good street pump for a non return line setup.

If interested, I will soon have a Like New Holley Blue Pump for sale very reasonable. good Luck

How reasonable? I'm interested, PM the details.

Using a return style regulator will help quiet down those noisy electric pumps. Made a big difference with the Blue pump I had. It still wasn't anywhere near silent though....

Unless you have a sumped tank none of the Electric Mallorys or Holleys will last in regular street driving. Using the standard pickup is too much work for them. Maybe a return line might help. I switched to a Carter 172 and fuel delivery has not been an issue for a couple of years. If my blower motor had a provision for a mechanical pump I would be running the carter on it. Good Luck

I too got tired of listening to my electric pumps until they failed, which they all did eventually leaving me stranded. I now use one of Howard Stewarts new pumpshttp://www.racepumps.com/tech.html. It supports the fuel requirements of my turbocharged Sm Blk no problem
I also like the simplicity of the fuel system now. With the Aeromotive A1000 electric I had a sumped tank, #10 feed and return lines along with a 13204 return style regulator. Now I just use the #10 feed line and a 13201 deadhead regulator.

I had the Carter 172 mechanical and found it couldn't maintain pressure throughout a run with 3/8" line. I switched to an Aeromotive SS pump and 1/2" line -- no more problems.

The Aeromotive pump isn't very quiet though -- I made a sound mount for it and that cut the noise roughly in half.

The Edelbrock pump worked fine for years I guess I'll just replace that.My Vette sounds like thunder in the distance already.Don't really want any more noise.
I was thinking if I had a vapor lock issue an electric pump would fix it. I'm not really sure whats going on yet. The fuel pressure guage drops to zero after 15-20 minutes even just idling in the driveway.I figure it's the pump.