Early Intake Manifold Score

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srm351
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Early Intake Manifold Score

Post by srm351 » Thu 27. Aug 2020, 10:55

I've been casually searching for an early intake to replace the original on the '65 430 in my F100 since hood clearance isn't a concern. I finally made it down to the local pick-a-part in the off chance of finding something was shocked to discover a pretty disheveled '58 with the motor already apart and the intake sitting in the back seat! It needs a good deep cleaning but all the fittings came off easy and the threads and sealing surfaces look to be in good shape.

Two questions: Does anyone know if I'll have any fitment issues on the later motor?
Also, does anyone have any tricks for cleaning out the inside of one of these? I plan on sand blasting it but I'm not sure how well that will reach the inner passages.
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srm351
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Re: Early Intake Manifold Score

Post by srm351 » Thu 27. Aug 2020, 11:03

In case anyone is interested, I plan on doing a comparison with the later manifold to document the differences between the two castings. Already it appears that the carburetor mounting pad is roughly 1.25" higher on the early manifold and the ports at the head mating surface are 1.125" x 2.625". Additionally, the temperature sending port and heater port locations are swapped between the two.

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Re: Early Intake Manifold Score

Post by Chris430 » Fri 28. Aug 2020, 23:36

I have those height measurements saved somewhere. 58-59 4V, 60-62 2V, 63-65 4V and the 462 4V. Don't know what 4V Thunderbird used in 1960. Even started a post on it but abandon it. I think the interest got lost in life's shuffle. I have molds #1-3 of the EDG. I see you have #4. No difference I could see between the EDG's. I posted a couple of questions in your introduction post. Take a look and let me know.
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srm351
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Re: Early Intake Manifold Score

Post by srm351 » Sat 29. Aug 2020, 21:07

There's an intake on eBay currently supposedly from a '59 T-Bird, however it has a Mercury part number. It looks almost identical but it appears the top of the #6 runner has a slight bump the Lincoln manifold doesn't. Would be interesting to see your measurements.

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srm351
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Re: Early Intake Manifold Score

Post by srm351 » Thu 10. Sep 2020, 16:28

Well I got in a hurry, cut corners, and ended up nicking one of the tubes in the original radiator. I barely touched it so the tubes must be paper thin and when I drained it I found that it's full of junk and almost completely plugged anyway. The amazing part is that it always ran cool unless the temp was getting into the high 90's. The local radiator shop doesn't want to bother recoring it because he'd rather sell me a replacement 3 core copper/brass one for $450. :roll: He said a recore is going to be as much or more so I figured it's not worth the money just to keep an original date-coded radiator when the truck isn't all original anyway. I found a Chinese aluminum 3 core on eBay with stamped tanks that might almost pass as a stocker with some black paint for about half the price. We'll see how it fits once it comes in.

Anyway, I figured there was no time like the present to move forward with swapping my '64 "low-rise" intake with the '58 "high-rise" intake I scored recently. Here it is mid tear-down:
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Here are a couple pics showing the differences between the two. The later intake sits much lower in the valley of the motor, ports are the same size, but the heater connection and water temp sensor ports are swapped and the threads are different sizes. The highest ports in the '64 intake are about the same height as the lowest ports in the '58 intake. In the lowest ports of the '64, the mixture from the carb has to travel back UP to the intake valves. Crazy.
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Not shown is how the later manifold moves the carburetor towards the firewall about an inch to center the primary venturis on the engine. According to literature of the day this was supposed to make the engine more efficient but I feel like it was probably more of a packaging consideration with the lower hoodline of the later cars. Here's the intake removed and cleanup underway:
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Lastly a couple mock-up shots just to see how everything will fit. I'm going to run a 1" open spacer on this manifold (the old setup used a 2" four-hole spacer) because in my experience it should improve low- and mid-range torque vs. no spacer or a four-hole spacer.
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Re: Early Intake Manifold Score

Post by Chris430 » Fri 11. Sep 2020, 06:59

Look's good. Makes me want to get on mine. I also think it was the hood line. Lincoln dropped the hood line for 61 causing the 61 and up starter movement and the squished intake manifold. Look's like an FE thermostat housing was modified to work.

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