what would it take for a 351C w 385 hp in a 1982 f-150 i plan on putting an efi unit *SEFI* changing the intake to a mustang stock one.. it already has a performance cam... don't really know the lift and duration because i bought the truck already modified... is there anything else i can do? preferably on a low budget.. because i'm almost totally broke and between jobs..but i am pretty good a fab work and reading diagrams.. and i do know a stich or two of wiring.. i hope this works... cuz ive always wanted a mustang, but cant afford one at the moment and want to run with them... any help is welcome

 

A man and his dreams! Oh boy! This isn't going to be easy, cost wise that is. First thing to do would be to find a Mass Air Flow EFI system. Don't use Speed Air Density, the computer is really fussy about mods and doesn't like being toyed with. Chips help but you would be better off with a MAF system.

The usual thing to do would be to redo the exhaust completely! Bigger tubing and headers. Next open the intake like you described. Port and polish the cylinder heads, both intake and exhaust ports! See if you can find a performance intake manifold (Offenhauser or Edelbrock). Ignition modules: MSD-6A, Crane, Holley, ect and coils and you'll need spiral wound plug wires(Accel 300+) to work with the new ignition box/module. Also look for a performance distributor. Hotter plugs. Ummm..... oh yeah you'll also need a supercharger too. Make sure the compression ratio never gets about 9 to 1. If you go higher you blow the engine.

Because you want to push that many horsies look into a steel forged crankshaft and tougher pistons. If I ruined your day I apologize but this stuff cost mucho moola! Just save like the rest of us do!

 

How in the world are you going to put a mustang fuel injection
manifold on a 351c?

 

how in the world... its not technically a 351.. its a 302M with 351 C heads, a forged crankshaft, lots of head work, port and polish on the intake and a non restrictive exhaust system... the thing flies..sorry bout my error

 

Still yet, a Windsor (Mustang, Lincoln, Explorer, whatever) intake manifold will not bolt to your Cleveland heads.

385 HP is a lot to ask from this engine. You're going to have to wind it pretty tight to achieve that kind of power. High revving engines sacrifice torque at low RPM. That's the last thing you want to do in a truck motor. Trucks need torque to get their big brick shaped bodies moving.

If you're interested in power, why not build a stump puller 540 CID engine based on a 460 block? You could use the stock 460 truck EFI (with a few mods) & you'd make killer torque & still be able to use pump gas.

 

Okay, I'm still kinda funny on exactly wich engine were basing this on. from what you're saying, it's a 302 short block with 351C heads. Now, are they really 351C heads, or dothey just resemble them? I say this because I don't think Ford ever put 351C heads (or even made it possible with water passages and bolt patterns and deck heights, etc...) on a Lil-Henry. the closest thing to that was the 302 boss from 1969. Heads looked a lot like the 351C heads, and no one knowing would say "hey, that's a 302 boss" instead of "How did you get those celveland heads to fit?"

Curious-er and curious-er...

1989 F-150 : 5.0, shorty headers, Flowmaster cat-back, K&N filtercharger intake, March pulleys, "Multi-brand" performance ignition, soon to be Mass-Air...doesn't know she's not a Mustang

 

thanks for the insight guys... i don't really know myself.. i don't even have the sheets on how the truck was built up..i bought it used from a preacher... *long story* all i have seen is the dyno sheet... never any reciepts for garage work or anything else.. i think i'm gonna take this thing apart after i find myself a job.. and another way to ride.... and see whats inside her.. id hate to go around boasting and not knowing for myself... but belive me this ain't no stock 302... it may be a boss.. who knows... it definetly looks like a 351C because my brother has one in his mustang... looks very similar... oh well.. not bad for a first guess eh?

 

Easy way to figure this out. Count the number of bolts that hold down you valve covers.

6 = Windsor
8 = Cleveland




1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.

Can see both below.

[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]

 

6 cleavland... but i've always wondered why i could buy parts for a clevland and they would work on my truck... i used to do this when the parts store didn't have in stock the part i need for the 302

 

I'm sorry but I know that windsor valve covers have 6 bolts, and I have seen 351C Valve covers, and they have 8 Bolts. I don't think there's anyway possible to get the two mixed up.

It's a possibility that you have a 351 windsor, because certain parts between the 302 & 351 will interchange. But not parts between a 302 & a 351C, they're just two entirely different animals altogether.



1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.

Can see both below.

[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]

 

If memory serves correct some of the late 60's Cleveland were in the 365 to 375hp range from the factory. If you want to go with EFI try the Holley Projection system. From what I heard it seems to be pretty good and a lot simpler to install then trying to piece together a stock system. Knuckles is right. I have seen a few folks put Cleveland heads on the 351 Windsor in the past and it is big money to have the head work done. I may be wrong but here goes. A Cleveland passes water from the block to the heads while a Windsor passes water from the intake to the heads. Have to have a lot of machine work done to make the heads work. As for an intake. Just about your only choice is going to be a custom (read expensive) sheet metal intake manifold. I have never owned one but from talking to people who do I hear that the sheet metal intakes are bad about leaking at the gasket as the sheet metal doesn't expand and contract at the same rate as the rest of the motor. If you want that many ponies under your hood I would build a Cleveland or a 390. The 390 in my Fairlane is about 425HP and I had about 2000 wrapped up in building it. (I traded a lot of auto work for machine work though) Lots cheaper than the road you are talking about. Your way does sound cool though! Hope this helps!

Brad Godkin
1986 F350 CC/SRW
6.9liter/C6

 

i appreciate the info, i put this post in the performance forum and got totally dissed, i even contemplated not writing another post i appreciate everyone that took this as a legit story and didn't try to run me into the ground... i hate that feeling
tim
F.O.R.D
For Offroad Rebel Driving