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Author Topic:   need mopar advise
Dirt Roller

Total posts: 14
posted January 24, 2003 06:22 PM
Fellow mopar racers
I do not run in stock or super stock but am posting this for a fellow racer. He is building a Plymouth duster to run mostly on a 3/10 mile clay oval. The question revolves around what motor. According to our rules The street stock class motor wise must be basically stock (can have cam/any 4bbl carb [1]) that could have been ordered in the given model ( in this case early 70’s duster). Of course super stock is pretty open. He would like to run both classes if possible. As I understand it the duster was avail with 225,318,340 and 360.

If he decides to run only stock of the 3 V8’s which is more suited for the duster on a 3/10 mile track?

If he goes super stock of the 383,360 or 440 (he has a 318, a 360 and a 383 sitting there in the shop) again which is more suitable? Also any common motor tricks, any websites that discuss building these motors for short dirt tracks?

Last 2 years he ran a dart with a 318 in it but he has kind of “used up” the old dart.
Anyway just looking for some input. Any help would sure be appreciated
Thank you

Dirt Freak

Total posts: 310
posted January 24, 2003 10:55 PM
not really a mopar man but my brother is swears by the 360 says the 383 440 are two heavy and the 360 will be the easier to build up as there are alot of parts back and forth from the other smallblocks

Dirt Freak

Total posts: 352
posted January 26, 2003 11:58 AM
360 for sure, circle track did a test of crate motors and mopar out did both chevy and ford..

mopar 360 stroke is 3.58 so its obvious why...

i would go to theres a circle track section there and some very smart guys. i go check it out and take notes, i want to build a imca stock car, mopar.....maybe, but i have 10 years worth of gm parts.

Dirt Full Roller

Total posts: 45
posted January 27, 2003 11:15 AM
The 360 is probably the way to go. 383's can work well, but they're pretty heavy and it's difficult if not impossible to get any significant engine setback in a Duster without doing something that will end up making the car illegal (like removing the stock firewall and dealing with the rear steer drag link).

I think that your friend needs to decide which class to go with and build the car for those rules rather than try to make it work for both classes (Maybe since this is his first Mopar he should try the street stock class first).

It's hard to give you engine tips without knowing more about the specific rules. The difference could be as significant as choosing to run W-2 heads or stock production castings. Tell your friend that he should pick a class and then post back here with more rule information.

There are a few of us that participate in both the moparchat board and the dirt forum.

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