D4B and LD4B side by side pics

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Cudabnu

(3) 64 Val Verts. /6 4spd, 273/904, 318/727
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Since I am cleaning and painting 1 of each I thought I'd get a few pics. The main thing I noticed is the angled boss of the bolt holes of the d4b for the 64 65 only heads, everything else appears the same, couldn't really compare the ports as the ld4b is ported.
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Since I am cleaning and painting 1 of each I thought I'd get a few pics. The main thing I noticed is the angled boss of the bolt holes of the d4b for the 64 65 only heads, everything else appears the same, couldn't really compare the ports as the ld4b is ported.
View attachment 1715589164

View attachment 1715589166 View attachment 1715589167 View attachment 1715589168 View attachment 1715589169 View attachment 1715589170
Great idea. The intakes should be the same except for the hole size and angle. The D4B is closer to vertical where as the LD4B the bolt holes are close to 90° to the intake surface. I will make this thread a sticky so the information is easy to find.
 
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You can actually see little "pads" were the bolts holes are on the D4B, and there is an extra mounting point and plugged hole on the LD4B on the pass side
 
People who paint gasket surfaces......
Yes, because it sooo hard to clean off! :rofl:
It literally takes less time to clean off the surfaces than to tape them off and trim the tape so you can get to every surface. You should try it sometime, it will open your eyes to a whole new world!
 
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Great idea. The intakes should be the same except for the hole size and angle. The D4B is closer to vertical where as the LD4B the bolt holes are 90° to the intake surface. I will make this thread a sticky so the information is easy to find.
What method did you use to clean them befor you painted? I’m about to do the same and just wondering.
 
What method did you use to clean them befor you painted? I’m about to do the same and just wondering.
I first had to take all the old paint of with gel paint stripper, then used a degreaser, hosed them off good, set in the sun to dry, then 2 light coats of paint followed by 1 more heavy coat. I used VHT Chrysler red
 
I first had to take all the old paint of with gel paint stripper, then used a degreaser, hosed them off good, set in the sun to dry, then 2 light coats of paint followed by 1 more heavy coat. I used VHT Chrysler red
Awesome! Thanks for the fast reply
 
It helps to get the intake as clean as possible. Bone dry. That way, all the overspray you caked up on the gasket surfaces and inside the plenum and ports will stay in place long enough to let you finish the assembly, then come off and blow through your engine once it's running. And cause leaks, too. Most of all, you save at least $2 in masking tape and you can use that money to buy mint flavored condoms.
 
That plug in the LD4B exhaust crossover is probably the result of the add-on STP smog device that was required on some models here in California way back when, and then removed at a later date.
 
That plug in the LD4B exhaust crossover is probably the result of the add-on STP smog device that was required on some models here in California way back when, and then removed at a later date.
Nope, power brakes.
 
They both have a port there. I was referring to the one in the exhaust crossover on the one. That wasn't factory. Someone drilled it.
 
They both have a port there. I was referring to the one in the exhaust crossover on the one. That wasn't factory. Someone drilled it.
I see it now. Heat stove for the choke? It has a cast boss under it.
 
I use a bead blast cabinet to get manifolds really clean and even get any crud in the water and crossover passages out.
 
I too do not mask off. I fill the port with balled up paper and just spray. Then after paint dries, a flat Mill Ba$tard file to the gasket faces.
No Condoms needed, I know where my Manifolds have been.
 
Since I am cleaning and painting 1 of each I thought I'd get a few pics. The main thing I noticed is the angled boss of the bolt holes of the d4b for the 64 65 only heads, everything else appears the same, couldn't really compare the ports as the ld4b is ported.
View attachment 1715589164 View attachment 1715589166 View attachment 1715589167 View attachment 1715589168 View attachment 1715589169 View attachment 1715589170

Nice vintage intake thanks for the images etc !
Always good seeing some old stuff.
 
Here's a close up pic of the angle difference. The combo in this pic is a D4B intake sitting on a 273 with late model 302 heads. This was a mock up with no intake gaskets in the mix, but the angle would remain the same.
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Around 1975 I had a 1964 273 with the manifold bolts at more of a srtight down angle.

I wanted to put a Wieand single plane on it to replace the factory iron single plane.

My machine shop just milled the holes in the Weiand a bit wider and then milled a 12 inch piece of aluminum flat bar at the same taper angle to close the mismatch bolt head gap to the early 273 heads.

We then drilled the 10 holes and cut 1 inch wide tapered shims. Alowed me to bolt the manifold on without making it worthless for a later 340.
 
I found my old thread regarding the bolt angles and tapered washers:
search in titles for "D-66 questions" and go to post #34 for figures and pics. The correct tapered washer is 8 degrees. and can be used oriented with the thick side up or down to correct for early manifold on newer heads or newer manifold on old heads.

The angle for newer heads/manifolds is 10 degrees and it is 18 degrees for the 64-5 stuff
 
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