i have been contemplating this for a while,just for the heck of trying it......
i know for a fact that the 88-early-91 holley TBI found in pickups bolts directly onto the 383/400 2bbl. intake. i can easily put the single oxygen sensor in the driverside pipe,etc. the truck i am looking at has a 3.9 V-6 5-speed manual trans. i know the throttle-body and injectors are the same for the 239/318/360. i can use a computer for a 360/manual trans truck,which will give better fuel/spark curves. my question is,has anyone here done this conversion before? my biggest hurdle will be the distributor. the ignition is ran from the computer,and a SB distributor turns clockwise,and BB turns CC. i can modify the distributor. i am just seeing if anyone has done this. i have all the parts lying around,and it's just something i always wanted to try. the stock mopar/holley TBI set-up is 350cfm,just like the old BBD/carter 2bbl. carbs. i will use a stone stock 383 or 400 for the project. any thoughts or info??? thanks in advance.

I don't think it will work due to the ci difference. you would need to step up the pressure or injector size in the tb.

https://board.moparts.org/ubbthreads/show...part=1&vc=1

is a disscusion on a cheap way to do it, with links to some other forums where they used a 5.0 mustang system.

best way to do it on the cheap is to find a 454 TBI setup....should be pretty close as is, and the computer has been hacked to death so you could tune it to be close to dead nuts on...

w/ patrick. Use the GM stuff. Even a TBI off a GM 350. The computer has been hacked and since that GM 383 small block stroker is so popular, you might have some help there. My biggest issue with those systems is the lack of tunability on your end. Anything can be done if you're determined.

i myself don't agree with having to go to bigger injectors,for the fact that the holley/mopar TBI delivers 350 CFM of air/fuel mix,just as the old BBD was 350 CFM. and the TBI will do it with a bit more efficiency. add to it that i am thinking about using the 360/manual trans ECM,that alone adds a better fuel/spark map.and i don't have tranny issues to deal with,as the truck is already a NP535 5-speed manual. i am going to a buddies JY today,and pull a dizzy out of a 91 360 TBI truck he has there,and take it apart and figure out how it works. i am not wanting to do any "upgrades" to this 2bbl 383,except exhaust.
this whole thing is more of a challenge thing for me,doesn't seem like anyone has tried this paticular set-up,and,i like to do different things. and,i literally have everything at my disposal. worst case,if it don't work,i can have a big bon-fire out in the back yard,and start over another direction.lol.

Have you considered the idea that the TBI system you're talking about kind of sucked in stock form and did NOT like modifications? I'm all for giving it the ol' college try, but I predict this experiment will end with someone saying words to the effect "EFI sucks--I'm going to back to my tried and true carb. At least I know how that works."

I am highly skeptical that a Dodge TBI unit will mount directly to a 383 2-barrel intake.

Although I haven't held a Dodge TBI, I've got GM 5.0/5.7, 454 and a few 5.2/5.9 Magnum TBs laying around. They are nowhere close to a bolt-on.

What I can tell you is that Maggie V8 and 454 GM TBs have ~2" bores, located quite close together, and look very similar to this pic of a 360 TBI vs a 360 carb.

Others have given lots of good advice.

• The GM ECU and TB has great tech and parts support on the internet.
• The Dodge system is loathed by quite a few people who either have it or have tried to repair it.
• If you want TB, you go GM. If you want port-EFI, Ford is probably the best choice.

there are alot of folks here that bad-mouth the factory TBI set-up. i don't get it,i have owned countless 88-91 dodge trucks with 318's and 360's. never had a minutes problem out of any of them. the last was a 360 with almost 300K miles on it. course,all i ever done to any was free flowing exhaust,a K&N filter and routine maintenece. i mean really,if you had one of these trucks,and started throwing aftermarket heads,cam,etc at it,you were wasting time and money. about as fruitful as dumping money in a slant 6.
mine is for schnitz and giggles. i've wasted time and parts before for no good reason.lol

Since you have the stuff laying around, give it a try and let us know how it works.

The link AndrewH posted earlier has lots of detail on the distributors (some of it provided by me), but basically you will need to put the bigblock shaft into the TBI dizzy housing and pin the trigger wheel into the shaft at the right location based on #1. You'll need to use the pre-TBI rotor, I think.

After that, as already mentioned, fuel delivery might be a hurdle -- the injector pulsewidths for a 360 won't match a 383, so a fuel pressure increase will be required to compensate. You could do it with a nice adjustable FPR in teh return line or maybe do it on the cheap with a needle valve.

I think you'd need a wideband gauge to watch teh AFs while you adjust the FPR, unless you want to do it old-school via MPG, vacuum, sparkplug readings, etc.

Regardless, I would use a 4-V spreadbore manifold and make an adapter plate from aluminum. Mount the TB above the larger secondary holes. A 2-V intake plenum will be a bottleneck. BTDT.

As with most things like this, it could be really simple and effective or it could be a PITA, and you won't know until afterward.