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1986 Dodge W150 Royal SE trim with a 360
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Discussion Starter · #1 ·
I’m eyeballing a 5.7 hemi and 4x4 trans w/ transfer case on FB marketplace. I’ve skimmed through the search results and it seems to be like a lot of circumstantial advice, so I figured I’d start my own thread.

I want to utilize as much from the 5.7 as possible. My first question is, what do I need to make sure comes with my new power plant?
 

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I’d say a wiring harness and computer for sure. I believe 2015+ computers are locked and can’t be tuned
 

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Just remember driver side drop front rear end on the new rigs.... your front passenger side drop rear end won't work.

Neil
 

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I’m balls deep putting a Hemi in a 1979 Dodge cube van.

I’ve got the donor Aspen. And I’ve already figured out the first million things this swap is going to need.

The next million are next.

Fire away the questions.

G.
 

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90 w350 6BT Nv4500, 87 D150, 77 W150, 83 W150
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Depends on the year of the donor and what trans. From what I know the easiest would be an early 2000s ram. Some of the later stuff has a bunch of body control modules and abs modules that are needed if your going factory harness and computer. If you are going to go aftermarket harnesses that opens more combos. Holley terminator is compatible with a 46re. Otherwise you'd have to look into to engine harness/controller and then a trans harness and controller. There maybe a more options now I haven't looked since I swapped a Volare with a 2011 5.7 hemi 3 or 4 years ago.
 

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1986 Dodge W150 Royal SE trim with a 360
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Discussion Starter · #7 ·
My main goal is just the engine. The difficulty/expense of the additional complexity of also swapping the trans may deter me from considering that.

I gotta pencil it all out and weigh my options.
 

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If you end up with an MDS engine, I highly recommend pulling the solenoids and plugging the holes. MDS is nothing but trouble and it makes the Hemi sound like shit.
 
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Just get the engine. Holley has plug and play solutions, engine gear frankly is irrelevant.
 

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The later the better, IMO. Early Hemi's had a lot of issues and they got gradually better, though some of the later engines still have valvetrain problems. Plus the later engines make more power. Beware truck exhaust manifolds as they tend to warp badly.
 
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90 w350 6BT Nv4500, 87 D150, 77 W150, 83 W150
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09 Eagle version up has better heads, more compression, and more power for the 5.7s. 03-08 has no variable cam timing but both versions can have cylinder shutoff. 6.1 are sought after for good heads, larger bore and no variable cam timing. 2011 up 6.4s are powerhouses as well 400 hp truck version 470-485 hp for car depending on the year. They have the best heads on factory hemi, they have variable cam timing and and are the more expensive version of NA Hemis.
 

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My aftermarket harness uses the factory 545 trans with no other controller but the factory PCM.

I’m going with a 518. The truck turns 3100 rpm at 60 mph so the 31% overdrive will help a lot. If it’s too steep I’ll go back to the 545 with its 20% overdrive.
 

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1986 Dodge W150 Royal SE trim with a 360
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Discussion Starter · #16 ·
Those who have done this swap. Is the juice really worth the squeeze?

I could throw together a ripping 408 for relatively reasonable money. Sure not on the level of the hemi, but certainly a bucket of torque for a bare bones 4x4.
 

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I’ve owned a 318, 360, 408, and 5.7.

5.7 hauled the most ass stock.
 

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IMO you will probably have more in the used hemi swap then you would the new/rebuilt 408. Plus I like carbs anyway, lol.
 

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408 will technically make more power, as it's highly modified, but the stock 5.7L in my 18 2500 makes 383 HP and 400 ft lbs of torque, bone stock. That's not bad for a reliable, stock engine with no mods whatsoever. Then there is this...

 
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90 w350 6BT Nv4500, 87 D150, 77 W150, 83 W150
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Well for what I had for money just to put a stock 5.7 in my Volare I could have done a nice small block built for it. Heck a budget junk yard magnum with a couple goodies I had in it ran just as good power wise. If you grab a 03-05 ram 5.7 truck for a donor is probably cheapest way to swap one. I'm not sure what t case would work to switch back to passenger side with 545rfe. That said I do like hemis have 305k miles on my 04 ram 2500 and had 150k on my 07 300c till some guy ran a red light last snow storm. They are good runners stock and I haven't done shit for maintenence on either other than oil changes.
 
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