750 Holley double pumper on Slant 6??Will it be to much carb

MotorHoggGears · Jul 17, 2019

I have 1980 Chrysler lebaron with the 3.7l 225ci and I want to convert it to a 4 barrel with some kick this is a stock /6. I know I have to mod intake but is there any other things I need to worry about like pistons or anything of that sort cause I want some sealed power pistons but idk if it's right ???

Any help will be appreciated

Aspen500 · Jul 17, 2019

A 750 double pumper is WAY too much for a S6. Unless it's highly modified and has forced induction, a small 4 bbl like a 450 is much better. On a stock engine that's still probably too much carb, even if jetted down. I'm not a S6 guy but chances are you'd do better with a 2bbl from a Super Six and I'm sure the S6 guys will chime in and either agree with me, or call me an idiot

beatersRus · Jul 17, 2019

youd be better off putting a standalone fuel injection system on it than anything else.
the slant six intake has some serious issues for carbs/fuel distribution.

volare 77 · Jul 17, 2019

Or A 390 holley. I have two of them on my tunnel ram.

Aspen500 · Jul 17, 2019

volare 77 said:
Or A 390 holley. I have two of them on my tunnel ram.

That's the one I was trying to think of, not a 450. Brain fade has set in.

volare 77 · Jul 17, 2019

ok, why is the 390 so expensive now at almost $600. A refurbished one at $300. WOW.

Oldiron440 · Jul 17, 2019

I've been told the 450 actually works better than the 390 for a single carb......

MotorHoggGears · Jul 17, 2019

I was thinking about changing to efi but I thought it was to much stuff to convert but this guy was selling the doubler pumper for a 100 bucks and I started to think how I can make it work and the right way. Plus everybody suggest 390 and I wanted something a little different. I have read tons of forums and everyone suggest 390, is there anything just as good or better

beatersRus · Jul 17, 2019

if you are going to cam it up and put Good pistons in it With Good rings,then yes a 450 cfm would probably be okay as long as you Tune it in.
just keep in mind,do NOT go crazy on the cam or you will waste your time and money trying to make it streetable.

ps,i see you have an 80 lebaron,as do i,may we ask for Pics of your Ride?

MotorHoggGears · Jul 17, 2019

Yes I will take some now and it was hard to find but I made sure to get her and the real project is the 440 I want to put in it never done but should have been and beaterus what's some good piston

Oldiron440 · Jul 17, 2019

Half a 750 is a 375, just run it on the primary's and pull the linkage off the secondarys.

beatersRus · Jul 17, 2019

sounds you are at the crossroads i am already at.
what to do...big block small block or ?

i finally decided to stick a stock drivetrain back in,and then start building up a Big block combo for later.
id advise you to go the same route and Save your money from a long hard road of disappointments.
ps,that /6 is Never going to impress you.

for gas mileage sure but for anything else V-8 it and dont waste your time man.
just my opinion.

MotorHoggGears · Jul 17, 2019

I understand that but I'm building it anyway so I can put it in a rat rod bout the only thing worthy of it. And the most I will do is 8.25 rear end better shocks and most likely find a kmember that fits big block. Found a motor mounts for big block to slant but 159 plus shipping not bad but I just want the k member and want to convert to awd another luxury it should have came with lol. I got the idea with a 84 Cutlass awd on Hoonigans

Duke5A · Jul 17, 2019

MotorHoggGears said:
I understand that but I'm building it anyway so I can put it in a rat rod bout the only thing worthy of it. And the most I will do is 8.25 rear end better shocks and most likely find a kmember that fits big block. Found a motor mounts for big block to slant but 159 plus shipping not bad but I just want the k member and want to convert to awd another luxury it should have came with lol. I got the idea with a 84 Cutlass awd on Hoonigans

No such thing as a big block K for these cars, only /6 and SB. Both require the use of conversion motor mounts. If you're going BB, then stick with the K you have.

Oldiron440 · Jul 17, 2019

Or you can remove all blankets from your K frame and build everything you need for a bigblock.

MotorHoggGears · Jul 17, 2019

Ok cool anything else that might need to be beefed up??

7T8 Custom · Jul 17, 2019

Subframe connectors.

beatersRus · Jul 17, 2019

MotorHoggGears said:
I understand that but I'm building it anyway so I can put it in a rat rod bout the only thing worthy of it. And the most I will do is 8.25 rear end better shocks and most likely find a kmember that fits big block. Found a motor mounts for big block to slant but 159 plus shipping not bad but I just want to convert to awd another luxury it should have came with lol. I got the idea with a 84 Cutlass awd on Hoonigans

okay im a bit confused and i think you maybe as well.
first off,forget the awd thing,its been done and it ends up with the car sitting on a 4x4 chassis.
second,you should figure out which way you want to go,if you are gonna big block it then go big all the way big radiator big brakes swap and so forth.
im new to the m-bodies myself sorta,i never got much into the whole sideways suspension.
im learning a lot reading the topics and stickies pinned at the tops of the forums,
you should go read some of those.

however,i can tell you that a ford exploder rearend/8.8,
is near identical width and the leaf springs are withing a qtr inch of the factory mounts on our cars.
and,bonus,a lot of them were made with 3:73 gears with limited slips,
like the 2 ive gotten for free already from junkers.
just a thought for whatever you decide to build.

MotorHoggGears · Jul 18, 2019

I understand but don't you have to do cut the 8.8 and is there anyway to prevent it from just sitting on a chassis and is there any new Dodge/Chrysler rear ends that's worth custom fitting??