I have been looking for a new intake and have found some with a plate or sometimes its a triangle pad. Just curious what its for.
EGR? Although most I have seen are rectangular with pointed ends.
That is what I thought at first. But could not confirm. C8ZE-9425-A is the intake I was looking at 1967/68.
Not a plate, flat pad on that intake, and others.
My thoughts are that it is a carry over from when a road draft tube was used. Ford may have chosen to upgrade or modify existing intake manifold castings.
On the C6OE-9425-A and C6OE-9425-B, 289-2V and 289-4V cast iron intakes, that flat pad was where the thermactor smog anti backfire valve was attached 1966-67, on vehicles with smog i.e. California.
This is why I said plate. Its not the first that I have seen with this open. I als o seen them capped with a plate.
Wow. I’ve never seen anything like that.
Scott is correct. It allows that intake to fit 1962- 1964 small blocks - 221, 260 and 289 CI - that used a road draft tube instead of a Positive Crankcase Ventilation system.
Not real clear or my glasses are right but could you provide the casting date of the intake> Thanks
9J13 is the date
The seller says it came off a 68 Mustang GT. But the Date#9j13 on the manifold is. My question is did they make a block off plate? My intake (aluminum better off as a pop can) has a crack in it. Should I consider this as a replacement?
No, they did not make a factory block off plate. The intake came with a pad. If you wanted to use the intake on an earlier engine you used a hole saw to make the round hole.
Here’s an unmolested example for comparison:
I find it intresting how the manufacturers approached things the same and differently. Pontiac had a PVC behind the carbs and it switched to the valve covers in the mid sixtys. My Farmall 460 has a draft tube for its vent. Being around older farms and equipment it intrigues me the different ways to accomplish tasks. I still look to the older things just so they are not forgotten. I checked out the book by Bob Mannel looking at the vent system. Pretty cool but I guess that is why I have a cougar, It have so many interesting technologies.
Thanks - given the casting date I wonder what the application it was made for or (might explain the odd opening) if it was a service replacement part made for over the counter sales. If the later the Cleveland could have been pulled out some older (pre-66) blueprints and added the newer engineering numbers. Just a thought