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351w to 351m swap in an 85 bronco

 
  #1  
Old 06-03-2019, 01:20 PM
BigBlueWindsor
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351w to 351m swap in an 85 bronco

Just wanted to get some thoughts here. I decided to swap my clapped out 351w for a 351m I rebuilt. Decently large cam, aluminum intake, Holley 750 double pumper, mid length headers, gear drive timing. Behind it I had my big block c6 built to hold abt 500 horse w heavy duty borg warner parts and a boss hog 2500 stall converter. Feed back?
 
  #2  
Old 06-03-2019, 01:33 PM
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its your rig do as you wish. Not the route i would have gone personally even having the motor laying around.
 
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Old 06-03-2019, 08:12 PM
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Originally Posted by Kemicalburns View Post
its your rig do as you wish. Not the route i would have gone personally even having the motor laying around.
Itís not a forever thing. Iím 18 and in college, so Iím working with what I got. Eventually Iíd like to move up to a blown 460, but thatíll be awhile
 
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Old 06-03-2019, 10:10 PM
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Did you build it as a 351m with the 8:1 stock pistons?
 
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Old 06-04-2019, 11:19 AM
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Yes. Stock parts. I rebuilt w a few mods so itís mostly stock. Just cam, intake, headers, gear drive. Roller rockers coming soon
 
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Old 06-04-2019, 01:08 PM
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Well, good luck with it!
 
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Old 06-10-2019, 02:55 PM
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Why do you want the Windsor out? just curious. You seem like you're strapped for resources, might do a whole lot better selling or exchanging the 351M and fixing/buying another 351W.
 
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Old 06-10-2019, 03:00 PM
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Originally Posted by Encho View Post
Why do you want the Windsor out? just curious. You seem like you're strapped for resources, might do a whole lot better selling or exchanging the 351M and fixing/buying another 351W.
I think it would be cool. Itís taken a lot of work including making custom motor mounts. Iíve searched and searched and never seen anybody swap a 351m into these newer truck. I get because the motor wasnít the greatest ford ever made, but I figured I had it and Iíd try it. Itís an experience and it shows that it can be done, even though others told me it wouldnít work
 
  #9  
Old 06-10-2019, 07:42 PM
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I have a 351M in my truck and have been driving it as a daily for almost 7 years now. I cammed it, edel intake, edel 1406 carb, headers and mild exhaust, 3g alt, efan, 4" lift, 33" tires, stock C6, and stock axle gears. I get just under 10 mpg. I am also very light on the right foot. Hopefully this will give you an idea of what to expect. I am the opposite, I want a 351W. Cheaper parts and usually better mpg.
 
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Old 06-10-2019, 07:54 PM
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Originally Posted by SlikWillie View Post
I have a 351M in my truck and have been driving it as a daily for almost 7 years now. I cammed it, edel intake, edel 1406 carb, headers and mild exhaust, 3g alt, efan, 4" lift, 33" tires, stock C6, and stock axle gears. I get just under 10 mpg. I am also very light on the right foot. Hopefully this will give you an idea of what to expect. I am the opposite, I want a 351W. Cheaper parts and usually better mpg.
I appreciate the feedback. Iím not too worried about gas mileage, as should anyone if youíre driving a bronco lol. My clapped out old 351w matched with the foot of an 18 year old boy, I was maybe getting 5mpg. No lift, 33ís. Hoping to get better w the new motor
 
  #11  
Old 06-26-2019, 07:51 AM
benshere
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I can understand the possible advantage going to the W motor......however I doubt it would ever produce the torque and HP of the M/400 without more money. My brother had a 79 with a 400 with a crane cam and it was a "hoss" ! If you research parts list you can probably come up with ford mounts/parts to install a M/400 in that frame. I once put a 460 w/c6 into a 69 galaxie 500 XL that had a 390 using ford frame brackets and mounts, so It can possibly be done. The issue will be how close the 85 frame is to the 79 frame so you can use the frame pads for the motor mounts. LMC still shows the 400 motor mounts and I think (last I saw anyway) they show the frame mounts for the 79. If the frames are not too much different that might work. If I had the time, I would do a 400 w/alum heads, retro roller cam, FI and the E40D tranny------in a heartbeat !
 
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Old 06-26-2019, 08:10 AM
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find a set of australian heads, that will wake it up a little more and give a compression boost too. you will have to be careful how much total timing you run after that.
 
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Old 06-27-2019, 01:48 PM
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Originally Posted by Redark1 View Post
find a set of australian heads, that will wake it up a little more and give a compression boost too. you will have to be careful how much total timing you run after that.
Do you know the numbers for a set of Aussie heads for it?
 
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Old 06-27-2019, 01:52 PM
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Originally Posted by benshere View Post
I can understand the possible advantage going to the W motor......however I doubt it would ever produce the torque and HP of the M/400 without more money. My brother had a 79 with a 400 with a crane cam and it was a "hoss" ! If you research parts list you can probably come up with ford mounts/parts to install a M/400 in that frame. I once put a 460 w/c6 into a 69 galaxie 500 XL that had a 390 using ford frame brackets and mounts, so It can possibly be done. The issue will be how close the 85 frame is to the 79 frame so you can use the frame pads for the motor mounts. LMC still shows the 400 motor mounts and I think (last I saw anyway) they show the frame mounts for the 79. If the frames are not too much different that might work. If I had the time, I would do a 400 w/alum heads, retro roller cam, FI and the E40D tranny------in a heartbeat !
Definitely a cheaper build. The motor mount ďpedestalsĒ so to speak, are quite a bit different. The 78/79 come up and sit above the frame about 4 inches, while my 85 has the ones that sit flush with the frame. I have figured out a motor mount solution though. I got off the stud and drilled all the way through. I welded a longer bolt through it and made a 1-1/4 inch spacer to go between the mount and ďpedestalĒ. Now to space the tranny a bit to level it out. Itíll work
 
  #15  
Old 07-11-2019, 08:06 AM
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Originally Posted by BigBlueWindsor View Post
Just wanted to get some thoughts here. I decided to swap my clapped out 351w for a 351m I rebuilt. Decently large cam, aluminum intake, Holley 750 double pumper, mid length headers, gear drive timing. Behind it I had my big block c6 built to hold abt 500 horse w heavy duty borg warner parts and a boss hog 2500 stall converter. Feed back?
I have a 1985 bronco and Iím thinking about buying a 1981 f150 with a 351m to swap into my bronco. Do you think I could just swap the 351m and trans into my bronco and still use my 4wd and what about wiring?
 

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