hey guys I got a 74 F250 with 360 & T18 with a stock 2 barrel on it. I am upgrading to a 4 barrel an putting a Holley 600 4 barrel on it. What cast iron 4 barrel intakes were available for the 360 & 390? Were there any performance 4 barrel intakes available back then in cast iron?

 

Here is a link to a page a FE enthusiast has put together FE Factory Intake Manifolds

Since the 360 & 390 are the same block anything that fits one should fit the other. Most cases after market are listed for the 390 but fit the 352, and 428 too.




John

 

ok thanks I will check it out.

 

Look for an "S" or a "T" iron intake. They will match the ports on your heads and are fairly plentiful. A lot of the 4 barrel intakes have larger ports than your heads.

 

What is a S or T iron intake? An I found one off of a 66 Merc car. with a 352 & one off of a 76 Ford truck with a 360. Should I look for one from a 390 or will the other 2 work an if so which one would be best to go with?

 

The "S" and "T" intakes will have those letters cast on one of the front runners and will insure that the intake will have ports that match your late style heads. Early heads had larger ports in the heads and intakes and will not match your heads. A '66 Mercury could or could not have the late style ports. The smaller ports improved low end and mid-range throttle response without loss on the big end by increased air flow velocity thru the runners.

 

From the link in #2 390SIntake1-1 390T-4BBL1a





John

 

ok so just because it fits a FE engine don't mean it would work with my heads? It is a stock 360 in my truck with no EGR or nothing like that on it. It has a stock 2 barrel intake an stuff an I am changing it to a 4 barrel using a Holley 600 4 barrel carb with electric choke. So I should go with the 360 engine that has the 4 barrel on it an leave the 352 intake alone in case it don't fit right? An if I find one that is on a 390 get it it will fit with no problem? But will you lose torque or HP if the ports don't match up? An what will be the advantage of the 4 barrel over the 2 besides better throttle response? I was told it will be better on MPG as long as I don't get in it & would be better all the way around for towing an so on.

 

If you're swapping over to a 4bbl, I'd recommend you put some headers on that motor. Those stock FE spatula manifolds flow terribly to begin with, so a 4bbl will be adding more fuel in, but that exhaust will massively rob the power potential and mpgs. The better it flows, the lighter you can got on the pedal. Even a cheap-o Summit set will make a world of difference.

I'd say go with the intake from the 76, should be about the exact motor if it wasn't swapped at some point.

 

Ok I was thinking of going with Hooker Comp headers an do dual exhaust with 3 or 4" flowmasters. But I heard you have to watch on the headers were you have to maintain them. But on the intake go with the 4 barrel intake from a 360 or 390 an not the 352 cause of the port size?

 

Comp headers are the worst thing you can go with. You want small tube headers (even a tri"Y" header) and a 3" or 4" duals are a no-no also. To much exhaust is as bad as the stock manifolds. This is a 360, not a 427, smaller is better. You don't know if the 352 manifold will not work until you pull the manifold and measure the ports. 1965/'66 was the change over and that 352 may well be an acceptable manifold. Oh and again there is no such thing as a 4 barrel 360. Ford never produced one.

 

Think about heat soak on the starter running headers. ya may want to wrap the starter with that heat resident wrap as they tend to not want to turn when hot. And headers will get it hot.

 

When I swapped out my 360 for a 390 I used GT heads and exhaust manifolds. I was told they would not fit, but they did and worked fine along with a 2 1/2" dual exhaust with an "H" pipe.

 

On the 352 intake I will pass on it an go with the intake on the 360 or 390 if I can find it. An yea I know Ford did not make a 4 barrel for a 360 I am changing the 360 up to the 390 when we rebuild it. An I will check bout headers but from what I hear clearance problems will be a issue if I had to work on it. So I need to look into that an check bout going 2 1/2 & 3". I need to replace the whole exhaust it is cut from the Y pipe on it.