i got a plymouth duster with a slant six and a heavy duty 230 three speed in the floor i want to put in a richmond six speed w overdrive but it uses the 18 spline input shaft and i got the other how hard would the conversion?

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six

Custom clutch disc and a different driveshaft yoke at a minimum unless Richmond has started making Mopar splined output shafts. Does the input bearing retainer diameter match your bellhousing? Does the trans occupy the same space in the tunnel or will you have to cut the transmission crossmember? I have a feeling you have to cut the crossmember an an A-body. Call Richmond and get answers.

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Joshua

it is supposed to be a mopar trans and bolt to a 4 speed bell housing i found it at summitracing.com

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six

Right, but the Richmond gearbox is much larger than the A833. You will likely have to do some cutting and welding of the transmission crossmember to fit the trans under the floor. Call Richmond Gear and ask if the 6-speed fits an A-body.

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Joshua

This might be helpful: http://www.richmondgear.com/07pdfs/RG21.pdf

Its lists the dimensions and other specs for the mopar setup but still have a lot of info to gather to see if you can make it work. Sounds cool though!

MJ

what about the cluch
i am definatly going to try it

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six

Years ago I helped a friend put a Richmond 5 speed into a 67 Barracuda, that took major floor and cross-member cutting and re-welding to install, but it worked good when completed.

As for the clutch, that will be the least of your worries, a custom made disc will put any spline count into any size disc. If you do some cross-ref. homework, there may-be a disc already available that will work.
DD

hey doc how much modifying alot or just not much or on a scale of 1-10 how hard is it

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six

I have a 5 speed in my car. On a scale of 10 it was a 3.....once I figured it out.

For reference I rate a disc brake swap on an early A as a 3 ......


The dimensions of the 6 speed make the project an 8. Essentially you would need to think in terms of a tube frame and completely new torsion bar mounts. The floor would change to the point you would need new seat mounts/seats.

A 5 speed wont do you?....or mebbe a 4 speed?

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Yeah....Im the one who destroyed this rare, vintage automobile.....

Yes, an "8" is about right.
You are modifing the structure of the car's chassis with this install, it needs to be done carefully and done right or you will 'bend' the car forever

to fit a tremec five speed you have to cut the floor tunnel out from the torsion bar crossmember to the firewall, or at least i will. the shifter will come out in the middle. also part of the crossmember will need to be cut out. if you go to www.classicmopar5speed.com you can see the kit that i have and will be using. the crossmember they install is a two piece design that, once installed, only the bottom piece need to be removed to remove the tranny.

any way you look at it, it's going to be a lot of work to put a 5 or 6 speed in.

zedpapa

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1970 dodge dart w/225 /6 bored .040" over, holley 390cfm w/vac. sec., compcams 252s, clifford shorty headers w/2.5" exhaust w/flowmaster, f-body 11" front discs, aluminum A-833OD, 8 1/4 w/3.21 SG
soon to have 5 gears!!!

The reason I rate my swap as a 3 is because I did not have to cut my floor except for the shifter.

I did have to modify my trans crossmember extensively. This is the hardest part of the swap.

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Yeah....Im the one who destroyed this rare, vintage automobile.....

thanks for talkin me out of it

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
http://cardomain.com/ride/3135091

hey that thing got a hemi? naw its just a slant six