LA 360 swap help
im a newbe to this sight but not to mopars ive had/have several. my newest buy is a 93 dak v6. it was a meter reader truck from the city i work for. good motor bad tranz.
im doing a 360 LA swap. i have swap mounts coming. today i started pulling the 360 (1975 model i put in my 70 dude) and realized that the mag has more bosses in the heads than a LA. id like to know how others that have done this type of swap addressed the power stearing pump. make adapter plates or use older pump? i am planing to take lots of pics during this swap to help others planing to do this swap.
im doing a 360 LA swap. i have swap mounts coming. today i started pulling the 360 (1975 model i put in my 70 dude) and realized that the mag has more bosses in the heads than a LA. id like to know how others that have done this type of swap addressed the power stearing pump. make adapter plates or use older pump? i am planing to take lots of pics during this swap to help others planing to do this swap.
ive spent some time going trough the post there found some good info mostly LA to LA or mag to mag but not much on LA to mag swap. and nothing about what power steering pump, pulleys, or alternator that others have used. have i missed a post somewhere?
Are you using the serpentine system, or are you wanting to go to a v-belt system? Or are you wanting to convert your serpentine pump to a v-belt? Personally, I went with the v-belt setup since it is simpler, but many have reused the serpentine brackets from the V6 and bolted them to the V8, since they are, I believe, the same. What are you exactly trying to accomplish?
Edit: Reread your original post. I would recommend getting the older style pump and install it.If you need bracket pics let me know, as I have a plethora of them.
Edit: Reread your original post. I would recommend getting the older style pump and install it.If you need bracket pics let me know, as I have a plethora of them.
id love to keep the serpentine belt but, the LA block dose not have the holes needed to bolt the steering pump on. im sure i can make brackets to make it work. but it might be a lot of unnecessary work to do the same job that a v-belt can do. and the v-belt would be the cheaper in the long run. i guess i gut talked myself out of the serpentine set up. unless i can find a pre-mag mopar that had the serpentine belt. id appreciate any pics.
Here is the older style bracket for the pump.

I would think that the pulley could be swapped onto an older pump, but you will need to confirm. It should be noted that the water pump is different between the two, and obviously affects mounting. March has serpentine pulleys. The serpentine is reverse rotation, and the v-belt is standard rotation.
Here is a stock bracket view:


Here you can see the a/c pulley delete at the top if you are not reinstalling your a/c.

To run, the crank pulley should be 4 row, if your running a smog pump, a/c and the alternator. 3 row, if you do not need the smog, and a minimum of 2 row if you only want power steering. 1 row if you only want waterpump and alternator. 3 row would be a compromise of deleting the smog lines and allow some flexability. The water pump pulley can be one or two, same for the alternator. Two row gives some insurance for belt breakage. I found the only Dakota in Florida that had the a/c delete pulley so that was serendipitous.

I would think that the pulley could be swapped onto an older pump, but you will need to confirm. It should be noted that the water pump is different between the two, and obviously affects mounting. March has serpentine pulleys. The serpentine is reverse rotation, and the v-belt is standard rotation.
Here is a stock bracket view:


Here you can see the a/c pulley delete at the top if you are not reinstalling your a/c.

To run, the crank pulley should be 4 row, if your running a smog pump, a/c and the alternator. 3 row, if you do not need the smog, and a minimum of 2 row if you only want power steering. 1 row if you only want waterpump and alternator. 3 row would be a compromise of deleting the smog lines and allow some flexability. The water pump pulley can be one or two, same for the alternator. Two row gives some insurance for belt breakage. I found the only Dakota in Florida that had the a/c delete pulley so that was serendipitous.
thanks for the pics. they really help. im guessing the threads are the same for the lines to and from the rack. i have 3 or 4 rigs that have all the pulleys and accessorys still on them. my dakota was 3.9 auto 3.55 posi longbed am/fm ac delete. the build sheet(still in the glove box) says that it was ordered as a work truck.
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received my mounts from schmacher a couple of days ago. "tried" to install them today. who ever welded them together warped them bad enough the oem brace is a half an inch to short, driverside motor mount surface is to steep. the pass. side is ok accept for where you drill holes trough the frame is 1/4 inch away from the frame and tight at the bottom. if i didnt know the history of this truck i could blame the truck, but i cant. it has 36000 miles and has never been wrecked. sent them an email. but i cant wait 3 more weeks. im going to fix these. next time ill make mounts myself. i made mounts for a 360 in a d50 a few years ago. to bad the front end couldnt hold up to the weight.
Here is my way of mounting an LA into a Gen1.....
The bracket is large, made to include the sway bar mounting, which is 2" shorter than the old sway bar bracket, hence the 2x2 spacers, temporarily thin metal tubing. They will be blocks of aluminum.
The blocks of wood represent the motor mount cushions. I will be drilling the frame later today and making it permanent.
The bracket is large, made to include the sway bar mounting, which is 2" shorter than the old sway bar bracket, hence the 2x2 spacers, temporarily thin metal tubing. They will be blocks of aluminum.
The blocks of wood represent the motor mount cushions. I will be drilling the frame later today and making it permanent.
Last edited by bill55az; Jun 25, 2011 at 08:14 AM.
Mine will be a very basic "town" truck, no power steering, no AC, just a balanced 330HP LA360 with Magnum heads and 92-93 exhaust manifolds, 3" single exhaust, 727 with floor mounted cable shifter and cable kickdown , 3.55 suregrip.....and a 125mph speedometer....
The dirty engine shown in the chassis now is a Magnum engine, using it for the mockup to make sure everything fits.
If I use the Magnum exhaust manifolds, it is a tight fit from Y pipe to passenger side frame, so I have moved the engine towards the drivers side about a half inch or so....
But I am thinking about headers....and dual exhausts. That means a new gas tank where the spare tire goes....
That's the plan....
The dirty engine shown in the chassis now is a Magnum engine, using it for the mockup to make sure everything fits.
If I use the Magnum exhaust manifolds, it is a tight fit from Y pipe to passenger side frame, so I have moved the engine towards the drivers side about a half inch or so....
But I am thinking about headers....and dual exhausts. That means a new gas tank where the spare tire goes....
That's the plan....



