Hi my name is John and I'm hoping to get some technical help. I bought a 1972 Gold Duster rolling with plans on installing a 360 magnum engine. I plan on going with carb not F/I. The car has a TF904 with it. What parts are necessary for what I'm trying to do? Any wisdom would be greatly appreciated. Thanks John

 

This will help with an LA timing chain cover to use a mechanical fuel pump.

http://www.hughesengines.com/Index/p...3&partid=22194

 

Hey John... Weclome to the forum.... All I work with is race cars so not much help with your question but much Mopar knowledge on here so I'm sure you will get all questions answered... Be sure to check out the Mopar of the Month contest....

 

You have to make a choice as to what you want to do:

Magnum motor and accessories in the car with serp belt.

or

Magnum long block converted to LA accessories "as posted above".


Points to consider.

Magnums use a reverse rotation water pump. So if you want the mechanical fan that came with your car you must use LA.

The magnum water pump will not work with a mechanical fuel pump. But holley's little red or blue pump works very well with a carb and helps with heat soak and hard starts. One of them is self regulated too. Just check my old posts I listed the specs. There is a holley rep on here too. He can get you sorted.

Only other issue is the intake to cylinder head bolt angle. Magnums are vertical. LA are angled. So you need an intake that fits the heads.

Stab in a distributor and run.

 

welcome!]
there is a lot of help here
the magnum is around 300 hp oem right?
The 904 trany will have to be upgraded or replaced with a 727 or a [518 "if you want to do the work"] also what size rear end is in her?
you can get all the other parts at summit or a other speed parts house

 

Nonsense

 

welcome to the forum

 

Thanks to all who responded. I bought the car as a roller. It had a 360 (LA) in with TF 904. The seller removed engine and I'm only trying to get it on the road again. The rear suspension is already set-up ( Caltrax ). Car has headers, MSD ignition , Holley blue fuel pump. Plan on putting electric water pump on it. The car ran 12.20's with LA motor. I thought having a Magnum would give me a roller motor with a better oiling system. The biggest question is the flexplate / converter. I know the 904 is a little light but this is going to be occassional race only. It's survived well, don't want to change much. Once again, Thank You Again - John

 

i broke three so they are not that strong.

 

Perhaps I need to look into a 727. Thanks

 

904 should be fine, a friend of mine has a '73 Dart Sport with a 360 / 904 running 10.80's and hasn't touched the trans except to change the fluid in 3 seasons.

 

Knowing now what you have for a car this is a piece of cake, with the option of LA V-belt drive or Magnum serpentine. If your going to dragrace this a trans blanket would be good insurance for your feet and legs.

 

Not a bad idea to install, don't need any parts in my lap. I have been told the 727 is the better choice. I just want a nice street car. Correct me if I'm wrong, a stock Magnum head only capable of a cam lift up to about 500 . Is there a cam that has a nice lope but can be used without modifying valve train? Don't need to be aggressive just sound nice. So far I plan to get a CSR electric water pump, Edelbrock M1 intake manifold, MSD distributer and a Pro Systems Carb. Starting to make sense now. Thank you Again John

 

Just a couple of ideas, I would never run an electric water pump on the street, drags for sure. That .5" might be optimistic I'd check for sure. I purchased a stem cutting tool from Comp Cams to put positive locks on and cut the stem down, worked beautifully, worth every penny as I will use it on others.

Trying to fit a cam into that stock head might be a bit small to support that M1. If your willing to sacrifice some power with a shorter cam with larger duration and less lobe seperation to get the sound there are some thumper cams and some of the manufacturers have audio on different cams that you can listen to and help your decision. For street cams I look for more lift without big duration and larger lobe seperation to try and maintain vacum with good low and mid-range power. I find that most cam manufacturers published applications are more realistic than they were in the past.

 

You can use the Mopar cam that they use in the 380 Crate motor. It has stock head with Mopar springs.

Some are tight on the retainer to guide clearance others looser. .510 tops. But measure. I would stay under .505 if it were I. The Mopar stick has .501 lift I think... I'll get the book if you need a part number.

As Coronet 500 said the tool is excellent! Drop the guide and add a good seal and you are off. Plus you need to change springs anyway. And the heads flow to .55. You can use Hughes 1110 ( AKA Pioneer spring that you can get at Northern Auto) or the Mopar .45-.60 Spring ( pricey!! ).

With an Airgap or M1 and headers its a 400HP motor all day with a cam in the 230 / 236 range.

 

Awesome info guys! That's what I'd like to do. As far as the water pump goes, if I'm not using P/S, AC will stock water pump still work? I believe its a reverse flow pump. I was planning on having only Alternator. Will direction of crank be correct for stock W/P ? Sorry I'm not a mechanic and not much experience that's why an electric W/P. I was also going to install electric engine/ trans fans on rad. and trans cooler. Thanks Again John

 

Most Magnums have a one piece weighted front dampener with a pulley that isn't removable. One or two years were but Id have to check the book.

I havent run one without the accessories. The tensioner sits off the pass side head and has the correct throw since it has its own mount but I'm pretty sure the idler mounts off the alt bracket. I'll check in am. A shorter belt and your good to go.

 

Mine is a one piece pulley. I'll have to make a alt. bracket so that all parts align. I still have all stocks part and brackets if needed. Thank You - John