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88' F350 460 to 300 six

 
  #1  
Old 10-02-2017, 05:39 PM
b1jetmech
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88' F350 460 to 300 six

Hello Everyone,

I picked up an 88' F350 2WD cheap. It has a 460/C6 combo.



My immediate plans are to swap in 300 six with either an E4OD (updated) or a M5OD (short term).

The reason is...I'm averaging 8.6 MPG with the 460 and really don't need that kind of a loss of fuel mileage for everyday driving. Plus, I just always liked the 300 six...and this is coming from a Chevy guy...LOL!

Here is a 300/E4OD out of a 94' F150 I picked up from LKQ





Here is the "Six" on the stand...getting ready to decrease.

So getting into this kind of swap...My question is will the 300 six frame perches work on a F350 frame that came off an F150 frame(donor Truck)?
 
  #2  
Old 10-04-2017, 12:01 AM
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Not sure if the perches will work. I suspect you will have to drill some of the holes.
Wouldn't have been easier to swap an E4OD in place of the C6 and maybe go to a 3.31 gear ratio (from a newer 10.5)?
 
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Old 10-04-2017, 11:32 AM
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In quick summary........ the 6's, 302, 351's all share most of the same components including air filter box, etc....the 460 had it's own...... so you may have to address each component.
 
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Old 10-05-2017, 05:54 PM
b1jetmech
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Originally Posted by bbf385 View Post
Not sure if the perches will work. I suspect you will have to drill some of the holes.
Wouldn't have been easier to swap an E4OD in place of the C6 and maybe go to a 3.31 gear ratio (from a newer 10.5)?

That what I'm hoping for, is just some minor mods if it comes to that.

There is really nothing to do to improve upon the fuel mileage of a 460 engine size. Laws of physics come into play when large cylinders of an engine have to be filled and ignited. Nothing wrong with that but I don't think there is anything around it.

When I was young, I wanted my trucks to have big engines, lifted and loud. as I get older...I'm going the opposite direction..LOL!
 
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Old 10-05-2017, 05:58 PM
b1jetmech
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Originally Posted by Beechkid View Post
In quick summary........ the 6's, 302, 351's all share most of the same components including air filter box, etc....the 460 had it's own...... so you may have to address each component.
I do have the accessories including the AC compressor and air filter box. So, good to go as far as that. I am tempted to convert the engine to carb but, still working on the fuel injection harness to swap in.

On a side note, I did look up a power steering pump for the 460...it does have a different part number then the 6...so that is being addressed.
 
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Old 10-09-2017, 06:09 PM
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Originally Posted by bbf385 View Post
Wouldn't have been easier to swap an E4OD in place of the C6 and maybe go to a 3.31 gear ratio (from a newer 10.5)?
​​​​​​ That E4OD bolted up to the 300 six will not bolt up to the 460. The bellhousing bolt patterns are different. Not to mention he would likely need to source out an EEC-IV processor from a 460/E4OD equipped truck to make it work.
 
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Old 10-09-2017, 06:43 PM
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Obviously get the correct E4OD.
Yeah, it would require changing out wiring, but not to the same degree as a 4.9 swap.
 
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Old 10-10-2017, 08:16 PM
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Been decreasing the engine and gave a shot of Ford Grey paint. All of a sudden, something jumped out Or I should say, a couple of cracks became exposed. Look at the midway down the block under the 2nd and 5th freeze plugs. Looks like a couple of cracks!


Here's one under the 5th freeze plug.


Here's another under the 2nd freeze plug.

I filled the block with some water and no leaks. When I was pulling the engine, these cracks were hard to find and didn't see any rust trails like one would find with coolant leaks. So I'm very dumbfounded.
My guess is they ran straight water through it without antifreeze and and when a sub-freezing day came the water froze. I really never heard of a 300-6 block cracking but if water freezes, it doesn't matter what you have, it can destroy your engine.

So, I might make another trip to the junk yard and grab a short block. Because the cylinder head has no "air tubes" like most other 300-6's do.

Dang it!
 
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Old 10-24-2017, 01:47 PM
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Swap

Hi,
I am close to finishing swapping a 4.9l into a 1997 F-350 4x4 that originally had a 5.8l and I kept the original E4OD tranny. I think the frames are similar but not sure but the 4.9l mounts should work and just bolt in mine did. You will need a 4.9l PCM from anything 92' to 94' and if you use an E4OD you will need one that had one of those along with the 4.9l engine. You will more than likely need a o change the underhood wire harness, I had to the pinouts were a little different and the fuel injectors had no power until I made the swap. I would suggest if the truck is already a manual tranny to stick with that as you will have more harness issues to go from manual to auto. Also be aware that after 94' Ford changed the E4OD and moved some electronics from the tranny to the PCM so do not use a 94' PCM with a later tranny,

Brian
 
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Old 09-03-2018, 10:24 PM
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Well, it's been a while since the last post but I pressed ahead with the engine swap.

I am still using the engine here with the two cracks...Why? My machinist advised me to "JB" weld the cracks. He stated JB weld is more then enough to secure engine block cracks so as long the engine isn't seeing a hundred pounds of boost. So I went ahead with the ideal to at least try it.

First by roughing up the surface area...



Then took some strips of fiberglass and impregnate them with JB weld because fiber reinforce composite is much stronger...and applied it to the block.





Of course potential problems wouldn't be complete without rust int he cylinder
Just took out the piston and honed the cylinder...I'm thinking a rebuildable short block is in order.





Long block assembled and ready for install.
 
  #11  
Old 09-03-2018, 10:29 PM
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Now it was time to remove the 460/C6 combo.



The harness wasn't hard at all for this particular one just came unplugged from the engine bay harness. Not like that on all of them.
 
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Old 04-19-2019, 12:51 AM
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How does the engine run? Happy with the swap?
 
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Old 04-19-2019, 12:52 AM
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Originally Posted by BWD444 View Post
Hi,
I am close to finishing swapping a 4.9l into a 1997 F-350 4x4 that originally had a 5.8l and I kept the original E4OD tranny. I think the frames are similar but not sure but the 4.9l mounts should work and just bolt in mine did. You will need a 4.9l PCM from anything 92' to 94' and if you use an E4OD you will need one that had one of those along with the 4.9l engine. You will more than likely need a o change the underhood wire harness, I had to the pinouts were a little different and the fuel injectors had no power until I made the swap. I would suggest if the truck is already a manual tranny to stick with that as you will have more harness issues to go from manual to auto. Also be aware that after 94' Ford changed the E4OD and moved some electronics from the tranny to the PCM so do not use a 94' PCM with a later tranny,

Brian
I know it's been a while...how did the swap turn out?
 
 
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