I am looking to put a F250 suspension under a F150. Does anyone any suggestions? Pros and cons. It looks like it might be a direct bolt on. Has anyone done this switch? Any help would geatly appreciated.

 

4x4 or 4x2? If its 4x4 then its not a direct bolt in. Add on top of that you'd be bolting in one of the crappiest suspension designs Ford ever put on a truck, the leaf sprung TTB. The only thing to swap out a coil sprung D44TTB for is a solid axle D44 or a D60. There is no gain to swapping in another TTB, ESPECIALLY a leaf sprung D44HD or a D50. You don't gain hardly any strength and you'll end up with constant alignment problems as well as some frame issues.

 

Its a two wheel drive.

 

As I call it would require changing out the beams and everything. I don't think the 3/4 ton spindles will work on the 1/2 ton beams. The rear will require cutting and moving the spring perchs and shock mounts to work with the 1/2 ton frame. You will also need to have the driveshaft shortened to compensate for the longer pinion. I'm curious as to why you want to change this. You won't add any extra payload capacity to the truck as you're still going to be limited by the frame. The 8.8 thats in your truck is strong enough to hold up to the engine that would have come in it stock. The only reason I could see changing out the rear would be for a high horsepower application and I'd go with a 9" over a D60 rear for that. All this swap will really do is cost you money and time to change everything over. Thats the reason I haven't changed my 8.8 over to a D60. My 8.8 is strong enough for what I'm running. The only 2 modifications I will ever make to it will be a disk brake conversion for better stopping, and MAYBE a full floater.

 

My thought is to add to the payload capacity and stability while pulling a trailer. I want to beaf up the engine as well. I don't know what I want to do to the engine yet. I have thought about the overload springs. Just looking at all my options

 

See thats the problem, you won't increase your payload capacity. You still have a 1/2 ton frame in there and that will limit you to the factory load ratings. The only thing you'd be doing is adding bigger drums on the rear. Might as well upgrade your 8.8 or swap in a 9". Heck you can do a disk brake swap on a 9" for about $100. You'll be able to hold higher HP, and you can keep your factory bolt pattern and not have to buy new wheels and tires.

 

That makes sense. Thanks for the advice. What would you recommend to do on a 302 for more HP. Do you know what I could do for the spark knock problem that I have? It is really bad. The time is set right, I have used sea foam 3 times. I have 150,000 on the truck. Other than the knock it runs well.

 

For beefing up a 302 of that age........you should be able to get a chip or programer for it since its computer controlled. That will help the power out some. After that its things like air intake, exhaust, etc things like that. I wouldn't tear into cranks, cams, or things of that nature for a while since those are big money to have done, or even to do yourself for that matter. For helping the spark knock, have you changed your plugs and wires for a while? If they're older ones that could be causing some of the problem. My 97 did the something similar. I ended up cleaning off the MAF with electrical contact cleaner and that solved the problem. You might want to try doing that as well. If you have run any sort of oiled filter element then this will cause that kind of condition.

 

I just changed the plug wires. What type of plugs do you recommend? I don't have a MAF. I do have a K&N air filter in it. Are you saying that I should replace it? Thanks again for the help.