5.7 L hemi into a 72 Dodge Demon

[cuda guy]

Hi everyone

I would love to install a 5.7 l hemi in my demon and get an overdrive trany.

Anyone know of a factory tranny and mount that will fit.

Rick

 

[tyler_s18]

the 518 will fit with persuasion lol and you will have to customize your mount for the trany i believe. there are a few builds similar to this on here. i will see if i can find them cuz they have a lotta info. welcome to the site to and dont be scared to ask anything
http://www.forabodiesonly.com/mopar/showthread.php?t=59659 http://www.forabodiesonly.com/mopar/showthread.php?t=53074

 

[Tincup]

Hi everyone

I would love to install a 5.7 l hemi in my demon and get an overdrive trany.

Anyone know of a factory tranny and mount that will fit.

Rick

Welcome, and you should find a wealth of info on this site. You can read through my build (Tincup's 63 w/5.7) or 67 Dart Resto with a 5.7 just for starters. The tranny of choice is a 545RFE out of a late model Ram 1500 2WD. This will allow you to use a Diablo tuner to control both the trans and the engine. As for a mount you will have to fab up your own, but it is not that difficult.

 

[5.7 hemi]

Now get to work, we need more ****. Also, as Tin said, read those threads he posted, this will give you some direction and answer some ???'s you may have, but if you need help, as always, we're here for ya.

 

[pauls340]

Here's a Demon that showed up in Michigan with a 6.1L. It sounded great.

 

[fez440]

Here's a Demon that showed up in Michigan with a 6.1L. It sounded great.

wow that fits nice, you have anymore pics of that demon?

 

[Gdemon]

Sure how many would you like. lol

 

[cuda guy]

Hi great car, what type of transmission and crossmember did u use for this car, thanks for any help u can give.

 

[fez440]

wow i love that Demon!

 

[Gdemon]

Im using a stock 833 4 speed and a stock crossmemeber

 

[grassy]

I saw a new hemi package w/o the electronic and it has carbs..seems to me this would be the easiest.

Grassy

 

[cuda guy]

What size bell housing r u using. By the way great job

 

[magnumduster]

What size bell housing r u using. By the way great job

You can use the LA motor bellhousing with the 5.7. Though, I believe you need an adapter for the flywheel. Perhaps someone else can answer more defiitively.

 

[bayyum]

Good luck on the build and welcome to FABO!!!

 

[fstfish66]

LETS HEAR MORE FROM GDEMON PLEASE,,

 

[DionR]

Im using a stock 833 4 speed and a stock crossmemeber

Gdemon, did you space the bellhousing off the back of the motor to make up for the additional crank offset on the Gen III Hemi? Or just ignore it? Or maybe the replacement flywheel takes that into account.

 

[Gdemon]

Hi

No Im using a stock 340 bellhousing with a mopar performance flywheel.

 

[fstfish66]

G DEMON what he is asking is,,the hemis all have a longer crank,,and use a spacer between the back of the block and the bell housing,
did you use a spacer or is there a mopar engineered fly wheel to compinsate for the long crank shaft ?

 

[5.7 hemi]

Must use spacer when using an auto.

 

[thanson_mopar]

so a new hemi will bolt up to a 833 four speed bellhousing without an adapter or anything???

 

[5.7 hemi]

Not sure on the sticks.

 

[SirDan]

ive read that all the LA trannies bolt up but the one bolt doesent line up. i think people either drill it out for it to line up or dont use it. i think you need to modify your flywheel or get a specialy made on though.

 

[rjsjea]

www.quicktimeinc.com he makes bell's, spacers, modd'd flywheels for manuals and auto's to a GenIII hemi. I bought a 4l65e - 6.1 kit and it was perfect

 

[Gdemon]

Yes the mopar flywheel is engineered to compensate for the crank. Im using no spacers and all seems well. I have about 3500 miles on this setup. Im using a roller pilot bearing from a mag motor and had to shorten the input shaft on the trans about 3/4".

 

[fstfish66]

very kool that ma mopar has made a fly wheel like that,,,who has the spacer for the auto ?? thanks G DEMON