adding magnum 360 parts to la 360??

[david98513]

hello..i have a few questions about a motor i'm currently building for my 73 duster..

here is what I currently have..78 cordoba 360 motor..motor is rebuilt fresh from the machine shop..its .30 over with 10.1 pistons, 280 magnum comp cam, double roller chain, .10/.10 on bearings..

question #1..i currently have the stock 78 heads..i know the magnum intake wont fit the stock heads, if I change to the magnum style heads, I should be able to use the fuel injection from the newer motor??..what parts do I need to get from donor vehicle to make the fuel injection work? and does anyone have a link to where I can find the wiring diagram to make all this work..

question #2..i also want to switch from the single belts on the old style to the serpentine belt system like the newer motor..the duster has power steering and I will be adding a vintage a/c system to car..what parts do I need to convert my motor to the serpentine system? id like to use all factory parts since they are easily obtainable at local junkyards..

question #3..currently have a 727 but id like to switch to the newer tranny with overdrive..what tranny is recommended for a bolt on conversion..also worried about balance on torque convetor and flex plate..what harmonic balancer should I use to eliminate any vibration problems?

this is going into a 73 restro mod im currently working on and any help with these questions will be appreciated..

 

[txstang84]

Pretty sure you need to look at magnumswap.com.

There are a few threads going on about this in recent history-might do you some good to stroll through the first few pages

 

[67Dart273]

Yup. Do a search here first. Swapping mag heads onto an LA is well documented

The EFI will be a bit tougher. You have at least a complete underhood harness and all the parts?

What about the flex plate / pickup for the crank? Using a new OD trans you will have to modify the rear crossmember and chop up the floor. This too has been covered on the internet, search for that.

A couple of guys have modified the "beer keg" intake for better performance. I think if I was doing something like this I would consider dumping the keg and getting an aftermarket EFI manifold, or modifying one.

For the computer, if you don't have one it MIGHT be easier and cheaper to go with a Megasquirt.

 

[txstang84]

^^what he said...

I'm pretty sure there was a seller here a year or so ago selling a 70 Dart or something with a MS2 injection on a magnum with a 4 speed. Not sure how he went about doing the ignition, since the magnums use a crank sensor on the flywheel, but it can be done.

 

[Abodybomber]

http://www.forabodiesonly.com/mopar/showthread.php?t=1924
Hopefully this helps.....

 

[player1up]

question #1..i currently have the stock 78 heads..i know the magnum intake wont fit the stock heads, if I change to the magnum style heads, I should be able to use the fuel injection from the newer motor??..what parts do I need to get from donor vehicle to make the fuel injection work? and does anyone have a link to where I can find the wiring diagram to make all this work..

There are a few things to consider and needs to include question 3 for some of the discussion.
1. Will the stock PCM be able to handle the aftermaket cam and / or can it be programed to do so? yes, just need to find the right person.
2. If installing an overdrive trans, will it be an RE or RH trans? This is where the PCM thing comes into play.
Find an FSM from the donor if you decide to go that route, not all iterations of the magnum harness are the same between years and vehicle line. I'd recommend harness, power distribution center and PCM from the same vehicle. The harness can be cut at the firewall as everything needed to run the engine is in the engine bay harness. Preferably unplugged not cut though.
For factory EFI you'll need the intake, throttle body, injectors, harness, PCM
For any EFI you'll need a correct high pressure fuel system, preferably a return style with an adjustable regulator.

question #2..i also want to switch from the single belts on the old style to the serpentine belt system like the newer motor..the duster has power steering and I will be adding a vintage a/c system to car..what parts do I need to convert my motor to the serpentine system? id like to use all factory parts since they are easily obtainable at local junkyards..

The serp setup is fairly straight forward, you could use brackets / pieces from any magnum, the mag heads will have all of the bosses drilled for the mag brackets .
Couple things to be aware of:
1. Chrysler used 2 different A/C compressors. Mounting holes are ever so slightly off for the compressor. You'll need the correct bracket for the compressor.
2. Power steering pumps have the same fitting as the federal pump. I used the line off my old /6 and tweaked it a little to line up.
BUT there are at least 2 different brackets for the pump...truck vs van. The van bracket puts the pump low enough to clear the stock battery location. If you use the truck bracket, you'll need to clearance the tray or move the battery.

I'm sure there's more, but this will get you started on what direction you want to go.
I really think that the main issue you'll have with the stock EFI is that it will have to be reprogrammed by someone to support the new cam. Cruise the dakota-durango forums to find info on that. Lots of guys doing amazing things with trucks.

 

[Abodybomber]

question #1..i currently have the stock 78 heads..i know the magnum intake wont fit the stock heads, if I change to the magnum style heads, I should be able to use the fuel injection from the newer motor??..what parts do I need to get from donor vehicle to make the fuel injection work? and does anyone have a link to where I can find the wiring diagram to make all this work..

There are a few things to consider and needs to include question 3 for some of the discussion.
1. Will the stock PCM be able to handle the aftermaket cam and / or can it be programed to do so? yes, just need to find the right person.
2. If installing an overdrive trans, will it be an RE or RH trans? This is where the PCM thing comes into play.
Find an FSM from the donor if you decide to go that route, not all iterations of the magnum harness are the same between years and vehicle line. I'd recommend harness, power distribution center and PCM from the same vehicle. The harness can be cut at the firewall as everything needed to run the engine is in the engine bay harness. Preferably unplugged not cut though.
For factory EFI you'll need the intake, throttle body, injectors, harness, PCM
For any EFI you'll need a correct high pressure fuel system, preferably a return style with an adjustable regulator.

question #2..i also want to switch from the single belts on the old style to the serpentine belt system like the newer motor..the duster has power steering and I will be adding a vintage a/c system to car..what parts do I need to convert my motor to the serpentine system? id like to use all factory parts since they are easily obtainable at local junkyards..

The serp setup is fairly straight forward, you could use brackets / pieces from any magnum, the mag heads will have all of the bosses drilled for the mag brackets .
Couple things to be aware of:
1. Chrysler used 2 different A/C compressors. Mounting holes are ever so slightly off for the compressor. You'll need the correct bracket for the compressor.
2. Power steering pumps have the same fitting as the federal pump. I used the line off my old /6 and tweaked it a little to line up.
BUT there are at least 2 different brackets for the pump...truck vs van. The van bracket puts the pump low enough to clear the stock battery location. If you use the truck bracket, you'll need to clearance the tray or move the battery.

I'm sure there's more, but this will get you started on what direction you want to go.
I really think that the main issue you'll have with the stock EFI is that it will have to be reprogrammed by someone to support the new cam. Cruise the dakota-durango forums to find info on that. Lots of guys doing amazing things with trucks.

I suggest a P.M ,to member "foureyedfox".... He actually makes a conversion harness,exactly for this swap. Probably the most knowledgeable member I can recall here. Good luck.