Is the “63” on your head, like the number I have circled here, on this internet picture?

I’m pretty sure it does take the large thermostat. A friend had one of those ‘65-‘66 2-4 bbl Medium Riser intakes without the engineering numbers, and I thought I might have a picture, but haven’t found it yet. But Ford didn’t even have a FE thermostat housing for the small thermostat yet in ‘65, that didn’t start getting phased in until during the ‘67 model year.

I think it’s probably the same for both, but there was also ‘65 427 Low Riser 2-4 bbl intake manifold, so you may want to specify which one if you think it matters.

i had a solid lift 390 that came out of a 64,i thought that was the last year

Nope, top of the line 390 Police Interceptor for 1965 was solid lifter. Here’s a screenshot from the 1965 Ford Police car brochure

I don’t have any personal experience, but follow the subject casually like some others. Getting a little deeper into the question is probably warranted, as others touched on.

Why are you thinking about E85? How are you using the vehicle - race, street toy, more daily driver?

Are you planning on using pump E85 at random filling stations, or buying dedicated E85 barrels from a fuel supplier?


There are now quite a few “Drag & Drive” type events, similar to Hot Rod Drag Week, around the U.S. every year, and quite a few competitors that run E-85, especially if it’s available near the route, if there’s one of these events near you it might be a good idea to check one out and talk to the participants for their experience. Most folks like talking about their combination, providing they’re not deep in a mad thrash. And I do know, like already mentioned, those people all carry E-85 test kits with them, to monitor what they’re getting at the local station, which is why the question of what you plan to use is important.

Well, that just sucks  :'(

Quote from: durkzz8 on February 15, 2026, 05:48:16 PM

Transmission is E0AP

That's a 1980 or later FMX.

Dipstick tube hole in the case?

He’s correct, check where the dipstick goes in. I was going off the early bellhousing, I could be wrong. But in any case, see if there’s an I.D. code on it too, not just the main case casting number.

No sir, I sure didn't.  Just checked my PM's and nothing was there.

Got it noted, will put yours in with Jay's when they show up.

Thank you very much. Jay’s aware.

Here’s another early 427 medium riser intake manifold that turns up occasionally. You’ll notice that it doesn’t have an engineering number cast on it. One other identifying feature of these is that they don’t have the typical throttle linkage bosses cast on the rear of the manifold on the #8 runner. So far all of these I’ve seen people post have had a date code above the thermostat housing, either “11-64” or “12-64” like this one.