Hello Trucksters, My project involves installing a 1974 351 windsor engine into my 1979 F150 custom truck. I live in New Jersey where there is no longer emissions testing for my truck. However I might be moving to a state that has emmissions inspection. I need to know what emissions parts I need to make this work. Valves, hoses, etc. I have a diagram for an 351 windsor that is for the 1978/1979 E 150 Van (provided courtesy of numberdummy). Will this setup/diagram work for this truck project? Thanks.

 

Oh yeah, i have a 2150 carb with egr.

 

It's going to depend on the jurisdiction and what they test for I'm sure. But the bottom line as far as I know is that any area that does testing is not going to want to see an older engine, with older-spec smog stuff on a newer truck. In other words, they're going to want to see everything that came on the '79 vehicle under that hood.
Did the '79 originally come with a 351W too? If so that's pretty easy to hide as I don't know any smog checker that's going to verify that a similar spec engine has the right date code stamped into it. But if it's a different engine family completely, the visual discrepancies are going to send up flags and make them dig deeper.
If it's CA, they will flag you for having an older engine swap. Swapping in a newer engine into an older vehicle is allowed, as long as you include all the later year smog equipment. Swapping in an engine from an older vehicle is a no-no, but won't get noticed if all the visuals are the same. Or unless it fails the sniffer test by a large enough margin.

If you put an '89 Mustang engine in a '79 truck, they're totally fine with that as long as you keep the '89 equipment (all of it!) and get a referee to inspect it and verify you moved everything over.
The problems really start if you get a stickler that makes you run the full dual exhaust with headers and four catalytic converters from the Mustang too!

Good luck.
Where might you moving by the way?

Paul

 

351W: 1969/89 misc FoMoCo Passenger Cars; 1975/96 E100/350; 1981/96 F150/350 & Bronco; 1997 E250/350, F250 H/D & F350.

 

Hi Paul, Might be moving to Alaska. Checked their inspection regulations. Shouln' t be a problem their or in NJ either. NJ doesn't inspect my year truck. The real issue is this truck had a POS 351 modified originaly. I swapped it for a 351 Windsor. This year truck did not offer this 351 windsor engine. My question is will the emission setup for a 1979 E150 van that has a 351 windsor engine work on the same engine in my truck?

 

Original engine was a 351 modified. I swapped it for the 1974 351 windsor.

 

Other than the possibility of an odd fitting or two not being the same as on the Van engine, most of the stuff should bolt up and do it's thing. Or at least look like it's doing it's thing. You might have to swap intake manifolds too, if that helps fit some of the equipment, but the cylinder heads would have been different between the two Windsors most likely as well.
The different years, and even the different platforms during the same model year could have had various smog components and hose layouts compared to another. So you won't find much the same between what would have come on the donor engine originally, vs the van smog equipment donor, or perhaps even the original M in the '79.
But it should mostly bolt on and function.

One possible big difference would be the intake manifolds and their various fitting sizes and locations. Along with however the EGR valves were laid out and controlled between the '74 and '79 models.
And while one might have had an air pump ("Thermactor") the other might not have. And if both have it, the way the air is injected into the exhaust could be different. Does either of them have the pump? And if so, how is the plumbing laid out? You might need the exhaust manifolds of the donor if the air is injected into them directly, as opposed to through the cylinder head.
Since I don't know all the variations, or which components stayed the same throughout the years and models, I'm not going to be of any detailed help. But I think that in general you're on the right track.

Frankly, at this point the '79 van would seem to be the best possible donor to get as much equipment as would have been at least close to what you need for a '79 model truck. Since the M engine would not have had compatible stuff for the most part, I think you've got the best case going.

Good luck!

Paul

 

Thanks Paul, this should be fun. Not sure about thermactor. Engine didnt come with it. Egr isnthr same.

 

egr and spacer is the same