earlymopar
Well-Known Member
For those of you who have used this manifold, I'm interested in what the rear port shown was provided for.
Thanks, EM
Thanks, EM
Last edited:
Weiand 7503 (Poly 318)
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65RoadRacer
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No photo, but I'm guessing you're referring to the threaded port on the back, which is a vacuum port for the brake booster. just plug it if not needed.
BeatersRus
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every time i see one of these intakes,i start thinking about getting 1 for my poly.
i know its just a 318,but i cant help myself.
i know its just a 318,but i cant help myself.
earlymopar
Well-Known Member
Strange that my picture file dropped from the post. I just reattached it. Yes that's the port. I already had it blocked but was just interested in what the provision was for. Actually, my manifold has all indications it's a one of the first castings or possibly an even earlier prototype in that it had / has none of the production markings cast-in. It is simply stamped "7503" on the bottom of the manifold. The casting quality is also not quite up to the same finish level as the production castings with cast-in graphics. It was in such rough shape that it was perfect for modifying into the supercharger manifold it is now.
- EM
earlymopar
Well-Known Member
Very nice Darter and in a great-looking car to boot! - EM
earlymopar
Well-Known Member
This is mine before I swapped out the P600 manifold shown to the 7503 Weiand in order to reduce the overall height. Shown on the P600 is a 3-deuce to single-4plenum I made to allow the Magnuson to be added but also to create space for an intercooler if needed. The same plenum allows a single-4 barrel (without the supercharger) by changing out the top plate). The engine shown is actually my "test mule" and has 105k miles on it. I have a fresh engine I'll drop in this winter. I'm just buttoning-up things now with the test-mule and have it mated to a new TKO-600 5-speed. The headers are 302-351 Ford stainless steel. This is all in my 65 D100 Utiline.
- EM
Darter6
Well-Known Member
I posted this photo of a friends Poly before.Stroked to a 390 and heads by Toth Performance. It's in a 64 Dodge wagon and it will give any big block a run for the money.I couldn't get over how this thing screams when he let me drive it.
Oh wow-not grampa's 318 or pa's! Mine was redone with a hotter cam, solid lifters, eddy 4bbl headers, 3" etc. While it has nice giddy up not much as I was hoping for so still on the hunt for the mystery slug...
earlymopar
Well-Known Member
earlymopar
Well-Known Member
65RoadRacer
Well-Known Member
It does look like an early one, but I don't think it's a 'first run'... I have seen a few older ones, and yours isn't too far off from what mine was, which was purchased from Summit a decade or so ago. The really early ones didn't have the "W" outline.. they were like the one below:
With regards to being a blower manifold... Dick Landy used to sell Blower Kits for the Poly, he put together a 144 blower and a 174 blower kit (Holley) and he shaved the top off of the 7503 and welded a blower plate to it. If I can recall, the kits were $4500 and $5500, and would produce in the neighborhood of 350HP and 450HP, respectively. That was a long time ago, and I had never seen one of his kits... not for lack of trying!
earlymopar
Well-Known Member
Yes, I'm aware of the Landy kits that were produced. I've often wondered how many were actually made and sold. I suspect very few.
The manifold shown is not mine but is simply a picture I borrowed from the internet. Mine doesn't even have the Weiand script or the 7503. There was only "7503" hand-stamped into the underside of the manifold. There is nothing on the top surfaces. As well the casting surface finish of mine is / was like none others I've seen. It was very wavy and rough. I also found major casting voids in at least 2 of the mounting holes indicating metal flow was not correct or certainly not yet optimized. Mine does not have the 2 small holes shown in this picture at the 1:00 and 7:00 positions relative to the carburetor flange or the hole in the stiffening rib shown in the upper-left in this picture. The temperature sender hole on mine also looks nothing like the one in this picture.
- EM
65RoadRacer
Well-Known Member
ah.. okay, I thought you were showing your intake. Yes, sounds like you have one of the very earliest. I had talked to Landy's son for a couple of weeks back in the 1990s trying to get pictures or information about their blower kits. He had given me specs, but couldn't find any pictures or provide contacts. I thought it was pretty cool that his kits were a direct bolt on - perfect for the Poly because they're like 8.8 CR or something like that.
65RoadRacer
Well-Known Member
Incidentally, I still have this intake in primo condition. Not sure what I'm going to do with it at this point, but if I can find another car like a 55 Savoy or something, I'd entertain rebuilding the Poly and running my dual quad EFI again.
earlymopar
Well-Known Member
No kidding. That would have been a far easier route for me. I've had to make all of my pieces or adapt. I left my new engine @ a +.030" 318 and have NOS TRW forged pistons and am right @ 8.0 CR. Camshaft is 224/224 @ 050”, 270/270 adv, .470”/.470” lift, 112 lobe separation. I added 1.94” / 1.60” Pro-Flo Stainless Valves after machining the bowls. I'm figuring normally aspirated this should easily be in the 350 HP range with headers and 4 barrel. The supercharger should add another 100 HP conservatively. Fun stuff.
- EM
earlymopar
Well-Known Member
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