PetesPonies Posted September 28, 2017 Share Posted September 28, 2017 From the 1973/79 Heavy Truck catalog, it looks like the part # would be D9TZ 9430-A, which is what the box would say according to Bill and Chris, but the part would be marked D7TE 9430-EC. Rear Counter says there are 4 of them in captivity, although I didn't request a price. http://bullnose-enthusiasts.12971.n8.nabble.com/file/n2088/300_Exhaust_-_Heavy_Truck.jpg But Stevens Parts says there is a D7TE 9430-FC casting number. So, with the one Jonathan posted and the one Pete found, I'm thoroughly confused. http://bullnose-enthusiasts.12971.n8.nabble.com/file/n2088/300_Exhaust_-_Stevens_Parts.jpg There are versions with and without the threaded pipe port in the rear for EGR tube? Also there was some discussion about a version with four bolts attaching the intake log to the exhaust log. This one won't work for us unless you get the matching 4 bolt intake. It would be good to get to the bottom of this to know for sure which ones will work with our intake and which ones won't. Here is a good reference thread on the HD manifold: https://fordsix.com//viewtopic.php?f=2&t=56939 Edit: if anyone is wondering why David does not just buy a new one from Stevens, evidently these Chinese cast reproductions have a problem with cracking... and they are not exactly inexpensive to turn around and have that happen. That is why it is worth the effort to hunt down an OEM part. The flapper I could see, didn't notice the three bolt flange. That's why I said similar. I just use the EFI manifolds when trying to do better than the factory log. I have installed two sets of them. Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 29, 2017 Share Posted September 29, 2017 From the 1973/79 Heavy Truck catalog, it looks like the part # would be D9TZ 9430-A, which is what the box would say according to Bill and Chris, but the part would be marked D7TE 9430-EC. Rear Counter says there are 4 of them in captivity, although I didn't request a price. http://bullnose-enthusiasts.12971.n8.nabble.com/file/n2088/300_Exhaust_-_Heavy_Truck.jpg But Stevens Parts says there is a D7TE 9430-FC casting number. So, with the one Jonathan posted and the one Pete found, I'm thoroughly confused. http://bullnose-enthusiasts.12971.n8.nabble.com/file/n2088/300_Exhaust_-_Stevens_Parts.jpg There are versions with and without the threaded pipe port in the rear for EGR tube? Also there was some discussion about a version with four bolts attaching the intake log to the exhaust log. This one won't work for us unless you get the matching 4 bolt intake. It would be good to get to the bottom of this to know for sure which ones will work with our intake and which ones won't. Here is a good reference thread on the HD manifold: https://fordsix.com//viewtopic.php?f=2&t=56939 Edit: if anyone is wondering why David does not just buy a new one from Stevens, evidently these Chinese cast reproductions have a problem with cracking... and they are not exactly inexpensive to turn around and have that happen. That is why it is worth the effort to hunt down an OEM part. To continue the discussion, it looks like there were two intakes. Note that on the previously-posted clip it takes 2 studs to join the intake to the exhaust. How does that square with what is being said about there being 3 studs? Link to comment Share on other sites More sharing options...
85lebaront2 Posted September 29, 2017 Share Posted September 29, 2017 To continue the discussion, it looks like there were two intakes. Note that on the previously-posted clip it takes 2 studs to join the intake to the exhaust. How does that square with what is being said about there being 3 studs? Gary, every 300 I have worked on had 3 bolts holding the intake and exhaust together. The HD 300 in the 1970 F-600 dump truck we had at scout camp had the 3 bolt exhaust pipe flange. I am pretty sure it had 3 bolts, and I believe two were one direction and one the other. Link to comment Share on other sites More sharing options...
Ford F834 Posted September 29, 2017 Share Posted September 29, 2017 To continue the discussion, it looks like there were two intakes. Note that on the previously-posted clip it takes 2 studs to join the intake to the exhaust. How does that square with what is being said about there being 3 studs? Just to clarify: the number of bolts that join the intake log to the exhaust log is one issue. 3 bolts being what you need if you want to join it to a regular light duty intake manifold. There are HD manifolds out there that fasten with 4 bolts and won't do you much good unless you have a matching 4 bolt intake manifold: This is completely different than the number of bolts that fasten the head pipe to the exhaust manifold. The HD uses a three bolt flange, the regular light duty one has the ordinary two stud configuration: Link to comment Share on other sites More sharing options...
ctubutis Posted September 29, 2017 Share Posted September 29, 2017 From the 1973/79 Heavy Truck catalog, it looks like the part # would be D9TZ 9430-A, which is what the box would say according to Bill and Chris, but the part would be marked D7TE 9430-EC. Rear Counter says there are 4 of them in captivity, although I didn't request a price. http://bullnose-enthusiasts.12971.n8.nabble.com/file/n2088/300_Exhaust_-_Heavy_Truck.jpg Yessir, Gary, that is exactly correct, and you don't need to listen to me or Bill when it says just that in the catalog.... The Part Number is a xxxZ prefix and is listed in the catalog. The casting/ID number is depicted in the catalog prefaced with a hash mark/pound sign in the RH column. Link to comment Share on other sites More sharing options...
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