i am doing it and started the process of getting my 351 in my 93f150. i went to the bone yard and they kinda gave me a bum deal b/c most places would give u the whole nine yards but my lower intake they sold me didnt have the fuelrail, or egr connection. the intake is off a 92 e350 5.8 and i dont see any spot for the egr tube like my 5.0 has. what was the setup on these? or should i take it back for a truck if they r different? or with my conversion to the maf fms kit not miss it. also will the fuel rail off the 5.0 fit the 5.8 intake i tried to hold them up but couldnt tell if it woud give me problems
the bums also skipped to mention they sell the throttle bodies sep. should i find a cheap aftermkt? or keep looking for used. i know the 5.0 throttle bdy wont work. it is somewhat harder to find the 5.8 stuff here than the 5.0 thats why i went to the yuppie yard. i like going to a place that dont charge for the bolts

 

The fuel rail is wider on 351w. On my 85 the 302 rail is 2 pieces with efi fuel line connecting them so I just replaced the line with a longer one. My 85 302 and 88 351 use the same throttle body. Truck and van intakes should be the same. I can't remember where the egr hooks on 351 but it is different than 302. Did you also get the 351 upper intake and distributor, 302 will not fit.

 

yes i got the dist and oil pan, i am not sure on the year of the upper intake, oh it is a 95 ford van and the old 302 was stock for my 93. i just read somewhere more than once and the boneyard said that it was different, i guess i will just have to take it off and find out, i think it is bigger though. will it run ok without the egr? or will i have driveability problems, i dont have to go through emissions. the only thing i can think of is if the egr hooks into the exhaust or the back of the head somehow, someone go out to the garage and pop their hood quick to let me know...lol

 

You should really use the EGR system for your truck or there is a possiblility of plugging your cats (so I have heard) I just did this swap in my 92. The EGR tube for the 351 goes down into the exhaust manifold where the 302 went into the lower intake. You can use the stock 351 exhaust manifolds or have an exhaust shop weld the tube to your headers are whatever you are using.

 

how about the smog pump? if i forget to hook that up to the exhaust what happens? i think my throttle body will switch over but my fuel rail is too small. my injectors from the 302 i think will work for now til i feel like a upgrade in the future. any one else heard of plugging the cats? or removing them all together? i dont want a driveability problem. i have heard u can remove them if u get a sens delete or a resistor for the o2. more info?

 

got upper and lower intake from 89 bronco 351w interested?

 

I also advise keeping the EGR for driveability reasons.

You should only have one O2 sensor. The O2 sims are for the dual sensor systems, specifically for the rear sensor (it measures the O2 as it leaves the cat).

You can remove the cats and smog pump. But in order to do this you will need to 1)Relocate the O2 to the Y or H pipe (you need to retain the O2). 2) Remove the thermactor system and plug the holes in the heads (Ford parts dept will have these plugs). 3) Buy a shorter Serp belt.

I'm sure I left something out but this is all I can think of at the moment.

 

i tracked down a wider fuel rail, my throttle body fit, thank god, if i remove the cats i will probaly shouldnt have to move the o2 if it is in that little pipe between the two pipes, or will it set off the check eng light? sure could have used that intake a week ago, the boneyard took my to the cleaners b/c of the rareity around here

 

I know on my '92 351 the throttle body is a good 10 mm larger than on my dads 1988 clubwagon with a 302, both are E150 chassis.

 

Yeah, you can keep the O2 where it is as long as you don't need to cut the pipe farther up. When I cut mine out, I just cut the rear cat out and hollowed out the pre-cat and left it and the O2 there.

 

i compared the gaskets and i didnt see much diff, but then again i dont have a 351 to compare, guess a parts store might know for sure, but i think i will run what i have for now. 90f150moneypit
did the check engine light give you any problems? i had a hollowed out cat on there before, but i had too many other problems to know if it was that for sure. will cutting the egr/smogpump make it run any different? ex: rich/lean, rough/weak, tough/mean? the o2 sens will be getting something different than it is supposed to.

 

My light never comes on because of the O2.

There are a few members here including Hit man X that have removed there smog pump and thermactor system with good results. At least they didn't run into problems with how it ran. What kind of difference did it make? Don't know, that by itself probably not much.

 

LOL, I have done pretty much everything to my truck to make it run better...now that the intake leak is fixed it is great. I am happy to share my experiences with all!

I recently removed my Smog pump...it hasn't been hooked up for a long time. The check valve behind my heads has been gone for two Texas emission checks and passed fine and the check valve that ran from the pump to the cats (single high flow for me now) was gone when I passed last time.

The pump removal is easier said than done. You need to keep the belt on to take the 3 bolts off the pulley. Then the belt comes off to remove the pump. There is one bolt on the front and one in the back...it is hard to describe but it isn't too bad to do.

With the check valves gone, I removed the excess vac lines running from the TAB/TAD solenoids (I left them plugged into the harness to keep the CEL off). I still have and will keep my EGR as it helps low rpm throttle...I may try a resistor plate between the EGR and the upper plenum to limit EGR back flow. I do not believe you need an excessive amount of EGR to help the low RPM economy...I did an EGR limit plate on my '01 Z71 and it seemed to help the low and off idle power noticably.

There are no power gains to be had with the removal of this stuff, it was simply useless and taking up space under my hood.

 

just was afraid if i removed too much back pressure from the cats, the o2 sens would act up. i am going to try and retain the egr just with a smaller tube. if i leave the tubes off the back of the head i can just run a piece of hose off the smog pump to under the truck for now, as a idler the smog pump shouldnt rob too much noticable power? thanks for the knowledge, i might try removing the cats entirely if i am ambitious enough, but didnt want to do it inless i heard others had no problems.

 

Hit Man X, I have a 1990 F250 with the 5.8. The smog pump was totally disconnected long ago by the prior owner. (it is real corroded and obviously has not been used in a long time) It is squealing so bad I think it is about to come apart. I can remove it, I did that on my 5.0 mustang.... any idea what length belt I need ? I don't have the luxury of taking 10 belts from the speed shop and testing them till one fits. I was also thinking about a Motorsport smog pump delete kit. Any help would be appreciated. Rick.