I have a 70 Challenger 383 I don't drive that often. And that's part of the problem. The main reason I don't is it seems the fuel evaporates in the carb between runs, and whenever I do decide to drive it, the car runs terribly for quite some time until fresh gas has made its way thru the carb. (750 Holley)So it's a vicious circle- I don't drive the car because it runs poorly, and it runs poorly because I don't drive it.

Which brings me to EFI systems. I don't mind paying the money if it will make the car so that I don't feel like going further than 300 yards from home will require me to get my AAA card out. Any recommendations or experiences you could share?

Just out of curiosity, why is it I can let my 86 Toyota 22r (also carbuerated) sit for three months, and it starts right up?

I love EFI as much as the next guy, but if your issue is hard starting/fuel evaporating, why not an electric fuel pump? I run a 750 mighty demon on my 440 and it has gone through stretches of 8 months + where it doesn't get started. With the electric pump it turns over about 5 times and fires right up.

As far as running poorly once it does start, I'll let one of the carb experts answer that one...I dont have that problem.

It's not that it's particularly hard to fire up. It's just that when it does it bucks and snorts and blows white smoke and won't idle until it runs for 15 minutes or so. If I start the car every week there are none of these problems.

there are not any specific to the 383.

there are currently 2 self tuning out of the box kits for general carb to efi change over where you are not running boost and trying to wring out every single hp out.

atomic efi from msd, which is realitivly new, the other is fast ez efi.

have heard good things about ez efi. several members use it here.

there are other choices, but not recommended.
for instance holley makes one again but their past performance in this market leads me to believe it is not a good choice.

mega squirt is a diy type system. you build it yourself.

edelbrock makes one, but was only for rb blocks last time I looked.

and I thought, but don't remember mopar coming out with a setup?

the first 2 are supposed to be the easiest to plug and play and most complete. But you are looking at around 1k for fast ez efi, probably closer to 2. Atomic list prices show it around 2500 or so.

Dont forget to include a fuel system in that estimate $$$

forgot, depending on how much diy you are interested in and budget, there is a thread going on efi a differnt way.
people have adapted the 5.0 mustang efi to mopars as well.

required a new distrbuter, or modifying the ford and mopar ones to work, plus you will need to put injector bungs in a bb intake.
could probably be done in the 500 range if you could do the work.

if you needed the distrbuter would probably be closer to 1k.

just for a frame of reference, the basic efi system for my car cost me 300 bucks.
I spent another 700 or so to make it work.
110 for fuel pump
150 for regulator
175 for efi line(hose)
50 for sending unit
15 for efi hose clamps
20 for filters

some kits come with most of this stuff, but just to give you an idea.
not cheap, but I drive my car way more now than I ever did with a carb.
when I had a carb, I probably put 500 miles a year.
so maybe 2 tanks of gas. I probably have 2 tanks in it already this year, and it was down for a month while I rebuilt the suspension.

If it's hard starting, do an electric fuel pump. You just turn the key to run and let it fill the carb for a few seconds before you hit the key and it fires right up.

Get and electric EFI fuel pump. Get a regulator to get it down to like 6 PSI for carb. If you still hate running a carb, then you've already purchased the EFI fuel pump for going EFI.

POWERjection III I hear isn't too bad, depending upon who you talk to.

But ya, I recommend going EFI anyways b/c of better cold start driving, driveability, better economy, may make your engine last longer if always running rich, etc.

Don't know how true this is, but I've heard some efi pumps don't last long when run at low carb fuel pressures.

Ain't nuthin' wrong with a carb...

I'd be doing a little poking and prodding before I'd give-up on the carb...

Too many of the same scenarios here on different threads...

I can only describe what I've personally experienced with mine(going back 20 years)...

Pump-gas is (expletive-deleted)...

I use pump premium, spiked with a little Cam2, and have been using the green, marine-grade Sta-Bil for years...

No issues at start-up...Even after 'winter-storage' in these parts...