LR 4bbl Manifolds

[frnkeore]

As most know, I have a 390, 375 hp manifold and I bought Jay's book, because of that.

I've studied the book for the last week and what I found missing, was anything about what would be the 406 manifold (maybe the same as mine) but, there is no mention of a single 4, 427 LR manifold. It doesn't seem logical that the 375 hp manifold would have been used on the 427 and there is no mention of them, in the great book, that Jay did.

The LR that I had, back in '68 was a single 4 so, that kind of stood out to me, when looking through the book. Does anyone have on of those manifolds that they could show pictures of or, have info on them? Or, could they, possibly have been the same 390 manifold?

[Gregwill16]

Frank the 4v 427 is identical to the 390HP manifold just has a C3 part number. I have a couple but here is the Mustangtek link.
http://www.mustangtek.com/Intake/C3AE-9424-E.html

[frnkeore]

Thank you, Greg.

I looked on the site and besides the C3AE-E it also listed a:

C3AE-9424-F, 4v, Aluminum Ports, 2.14 " x 1.16"

Jay's book, list the ports for the 390 HP at 1.11 x 2.125 and mine are similar. I'll check them tomorrow, I don't think they are port matched, I found no grinding or blend marks.

I kept switching back and forth between the E & F pictures and couldn't detect a difference in the design, top or bottom but, if the F has larger ports, the runner may be a little larger, too.

Could the E actually be a '63, 406 manifold and the F, a 427? Do you have a example of a F manifold, that you could measure the ports on?

[Gregwill16]

Frank both of mine are the E version. One has been ported on some but the other came in about 2.175 x 1.105. Can't say that I've seen an F version. Based on other things I would say whichever the factory had on hand at the time went on the 406 or 427 in front of them.

[WerbyFord]

As most know, I have a 390, 375 hp manifold and I bought Jay's book, because of that.

I've studied the book for the last week and what I found missing, was anything about what would be the 406 manifold (maybe the same as mine) but, there is no mention of a single 4, 427 LR manifold. It doesn't seem logical that the 375 hp manifold would have been used on the 427 and there is no mention of them, in the great book, that Jay did.

The LR that I had, back in '68 was a single 4 so, that kind of stood out to me, when looking through the book. Does anyone have on of those manifolds that they could show pictures of or, have info on them? Or, could they, possibly have been the same 390 manifold?

Frank,
Last I heard it:
The 390-HP intake is a little taller than the 352-HP intake, and the runners are taller too. You can see it, as the 352-HP runners disappear "below ground" and the 390-HP runners do not. Near as I can tell the 390-HP intake flows maybe 20% better.

The 406-HP AFAIK is identical to the 390-HP.

The 427/410-LR intake, per a thread on fordfe.com way back, 3 July 2014 (good luck finding it!) LOOKS the same, but flows about 10% better than the 390HP-406 intake. I've never compared the two side by side, they look the same but I guess the 427 is a bit bigger. I'll have to re-link that old thread as all the links changed with good old Tapatalk.

ok I hunted the old link down here it is:

https://www.fordfe.com/early-61-alum-manifold-q-t101223.html#p915546

[frnkeore]

Thank you, Werby. That might be what the -F is in the mustangtek site, since all the others seem accounted for. It would seem logical that the manifold would have needed to be upgrade with the 37 ci increase, from the 390. The 352 to 390 was 38 ci.

The 410 HP manifold seems to be pretty rare, now a days. As I said, I had one in '68 but, never thought to document the casting number. That wasn't important to me, in those days. Especially since I had bought a my X ram for it. Had I got the X ram on it, I would have given it to my brother for his 390 GT. I'll have to keep my eyes open for one of those -F's now, if we ever get the swap meets back.

This is the key wording in the link:

Looking at the manifold from the top, the 427/410hp manifold has a little wider runners. It's very noticeable where 1 and 6 intersect. I don't remember how long ago, but there was a thread, with pictures, about one of those 427 manifolds. The discussion was about whether it was a 352/360hp manifold, or a 390/375hp manifold, and the fact that it was actually for a 427/410hp, was never mentioned.

[Gregwill16]

I was hoping the differences in the E and the F intake were discussed but not referenced. So still not clear which intake is the 406 and which is the 427, or if there is a difference.