341 De Soto Hemi to 747 torqueflite trans fittment

Hello Nubie to the forum...Shovelhead Jim. Building a1960 Morris Minor Gasser...question will a 70s 727 torqueflite transmission bolt up to a 1957 341 De Soto Hemi. Will I have to look for an adaptor to make it work? Need help with this problem...thanks.

You need to contact Gary @

www.qualityengineeredcomponents.com

He specializes in the first generation hemi parts including adapters.

- EM

Yep you will need an adapter. Good news is Chrysler, Dodge and De Soto 1st Gen Hemis all use the same one and there are a few options.

Another good source for parts and info if Hot Hemi Heads.

http://www.hothemiheads.com/desoto/index.html

here's the link to their home page.

http://www.hothemiheads.com/

Is the 341 hemi any diff than the 354 and 392!? I was told by someone that the 318 poly trans will bolt up to a early hemi

341 Hemi is Desoto, 331/354/392 is Chrysler Hemi.

Desoto had a 345 Hemi in the Adventurer.... same basic engine as a 341. 330 cubic inch Hemi too

Is it a completely diff block and trans .. than the Chrysler ?

Chrysler, Dodge and De Soto HEMIs each had unique blocks and heads with virtually no interchangeability between the brands.

The major thing that was standardized between the brands was the bellhousing and motor mount configuration. There were different amounts the crankshaft extended from the back of the block so in some applications you will find an aluminum spacer between the engine and bellhousing.

As far as using a 318 transmission it depends. The 57-61 cast iron case ones should be a bolt in. In 1962 Mopar introduced the aluminum case Torqueflite and at the same time shortened the amount of crankshaft overhang at the back of the block. The bellhousing bolt pattern was still virtually the same (the location of the lowest bellhousing bolt on the drivers side was moved inboard). Basically a 62 and up aluminum case Poly Torqueflite would physically bolt up to an early Hemi but without an adapter/spacer the longer crankshaft would cause the convertor to crush the front pump and/or crack the transmission case.

Additionally the first gen HEMIs used an 8 bolt crank flange drilled for 7/16" studs pressed into the converter/flywheel where the later 318 Cranks (I believe) are 6 bolt and and the crank flange is tapped for 1/2" bolts.

Basically the small block aluminum case torqueflite will require an adapter to use it behind an early HEMI.

For the OP's purpose, his DeSoto Hemi will take the same transmission adapter as all the pre-'62 Hemis and Polys except the '51-'54 Chrysler 331 with the extended block.

Yup and Hothemiheads has a world of information and parts. Let's not forget Wilcap. http://wilcap.com/Hemi.html

R.

I'm currently doing an A-230 manual trans swap onto a 325 Poly in my '57 Dodge, I opted for the Hotheads adapter and flywheel. Nice product and the adapter puts the bell housing on an acceptable center (only .008 TIR).

To all the fellow Mopar Hemi enthusiasts that replied to my trans problem question...thanks for your help and replys. I will be looking into the adaptor solutions and call HotHeads and other adaptor making companys. Shovelhead Jim 1960s gasser build.

Why a three speed? Shifter on the column and you want to keep it?

Yup. Plus the A-230 has a better 1st gear for a heavy barge and synchro low. Had to do some creative machine work to get the shift levers to line up properly.

The bellhousing has both the A-230 and A-833 bolt patterns so an OD 833 is a possibility. (Retain the column shift and operate Reverse with a pull cable.)

nice work on the shifter levers john ! i really like the 833 OD idea using a cable for reverse.
i tried to convince my buddy to do the same deal when he swapped a 4spd into his 64 galaxy 390 column shift 3spd, but he went the usual way and hacked a hole in the floor for the traditional hurst handle.

Back to the original poster. Don't know what you are going to use for a convertor, but you will need to make sure that the one you use does not have a balance weight as the DeSoto Hemi is internally balanced.

Can be done with re-engineering, lots of it.