i know the question has been asked a million times but im looking for any updated info on what all id need to do this swap. obviously complete motor with all accessories, mount towers, mounts, hoses, wiring harness and such. is the computer a direct swap? what about the clutch plates? and if the 351w i find is an automatic with a flexplate, will the clutches bolt in place of the flexplate? is there any mods for installing wiring harness? im just trying to get every last thing figured out before i tear into this.

And just cause everyone always asks why id get rid of the 300, i have had nothing but problems with it. everything from head gasket to coil to injectors to oil pump, water pump. you name it ive had it. also a very gutless motor on a lifted truck.

Any info or advice would be much appreciated,
-Andrew

 

You need a 5.8 specific flywheel or flexplate depending on what tranny you choose.
They will physicaly interchange but the imbalance weight is different from the 3 engines (4.9, 5.0, 5.8). The clutch discs will interchange as well as pressure plates. The PCM is a direct swap as far as fitting in the firewall. As far as wiring goes it all depends on what truck you have and what truck your pulling parts from.

 

Is your truck mass air by chance? All EEC-4 Ford computers use the same 60-pin connector but there are pinout differences between different vehicles and years. The truck wiring harnesses are all very similar for any given year with differences between MAF and SD versions and obviously 6cyl and 8cyl motors. So all you really need is two extra wires and connectors for the extra two injectors and then the harness will have to be re-loomed for the V8 engine layout. Another way around this would be to use a V8 harness but you're still going to have to match up the wires at the block connectors and add the V8 specific wires from there back to the computer, so some wiring diagram study will be in order. Also note that you would need a '95 harness to do this as there is no guarantee an earlier one would have the same connectors, and you have to make sure it matches the EFI type you already have.. be that SD or MAF.
The manual trans flywheel replaces the auto trans flexplate on the back of the crank and the clutch bolts to that.. and yes you can use the clutch you have, but the 5.8 has a 28oz imbalance so you can't use the 0oz I6 flywheel and will need a new one.

 

Something else to look at would be the cross member. The 302 and 351 trucks have an access hole for the oil filter. The 300 cross member doesn't.

 

The 300 crossmember has the same access hole for the filter (at least on the 150's) it's just covered by the engine mounting plates. Once you pull the 300, you won't need those plates.

 

thank you, thats all exactly what i was looking for. and it does have MAF

 

It might sound crazy. But why not sell yours and just buy one with a 350?

 

Cause I can't get enough for mine now since my motor just took a ***** on me haha. But I definitely would if I could

 

Haven't been on here in a while but I'm finally getting time and motivation to do the swap. I have a 1990 bronco with the 5.8 efi that I want to put in my 1995 f150 in place of the 300. Since there's a five yr difference in vehicles/motors, I have a feeling the wiring is going to suck. Reccomendations?

 

I digress. The 351 has its own clutch disc and pressure plate. (I found out the hard way).
The clutch and pressure plate WILL go on and bolt up to the 351 flywheel and move the truck around for awhile but after closer inspection and a smoked clutch slave cylinder it's not right. The 351 has a slightly larger clutch diameter on the flywheel. And the pressure plate is different as well due to the larger diameter.
The pilot shaft from both the ZF and M5OD have the same spline so just buy a clutch kit for a F-250 or 350 with a manual trans.

Do you know if your truck is MAF or not?

 

Yeah that '90 Bronco is SD so the wiring harness and computer are no good to you unless you want to make your '95 an SD truck.... which is perfectly fine on a stock motor.