Another "Is Fuel Injection a Worthwhile Upgrade?" Question

70dart340 said
I apologize for snapping the other day. It's out of character for me. I've read each and every post on this thread, and will continue to do so. While I do have a new QF 750 and an AirGap RPM, I've made some good investments during my life so buying a new, complete EFI system is not beyond my means. I'm not a millionaire, but I am retired and can afford to buy a nice system. My block is in the machine shop now, so I need to decide soon. It would be easier to put in a new tank, pump, and fuel lines while the car is apart. The amount of knowledge on this site is astounding, but I now realize this knowledge comes from smart people with strong opinions. I'll continue to watch this thread, and may even try to contact them for more knowledge, politely, and with their permission. I've owned my Dart since 2006, and can't wait to get her back on the road, no matter what induction I choose. Stay strong, my friends. Paul.

It is so much easier to do the conversion when the car is apart that if you're on the fence now is the time to decide. The fuel system is the most difficult part of the conversion so I always start there. In your case you are lucky since Holley sells a complete pump module that drops into an existing A body tank. Here is a link, take a look and review the instructions to help you make up your mind: Holley Sniper EFI 12-319 Holley 255 LPH OE Style EFI Fuel Tank Modules

With that module in place you would be able to reuse a stock fuel line and there will not be a need for a return line. You will need to add an additional EFI rated fuel filter in the engine compartment before the throttle body.

As for the throttle body you could either use a Sniper or a Terminator X. The Terminator X is a little more money but has more features and more importantly, it seems to have fewer complaints from customers. I would also recommend a Hyperspark distributor and then reuse your existing MSD ignition box and coil.

The most important thing to do is to download all of the instructions and read them over carefully. Do not buy a EFI kit without first reading the instructions. In fact I'd say that people should not buy a EFI kit without also sitting down and sketching out a schematic of how they are going to wire the car. EFI requires a full 12volts during both cranking and running and Mopar ignition systems are not designed to provide that. So the ignition system has to be re-engineered before you can install EFI. That is a detail that a lot of people leave out until the end but it should be addressed first. If you aren't willing to change the wiring system then don't start down the road.

I also highly recommend switching to a modern EFI type alternator when doing a EFI conversion. I use the 60 amp Denso alternator for my conversions since the Denso alternator is designed to work with EFI engines. Original Mopar alternators were not designed for EFI and they can be noisy. The electrical noise will cause issues with EFI systems.