273 Engine _ Need ID of Intake
Well as usual I have gotten some great (including pics) information on my question regarding the Intake. I went and got the casting number of the intake which I installed (wish I checked before), and the number 2531915 seems to match as a 340 intake. :oops: Of course I know nothing of what I am doing so that's why all the thank you's. I also got the casting number off the built engine I just finished putting in (it has the 340 intake on it now), and the number 2806030 - 273 - 2 seems to suggest that I have a year 66 block 273. Now if it's true what I hear, that the intake I have on there now is from the 70's I run the risk of water passages being blocked and I could end up cooking the engine, :violent1: Don't want to do that for sure so now I'm on the hunt for a 273/4bbl intake from 1965/66 hoping that will resolve any cooking issues.
I don't know any of this for sure just getting advise.
Now getting to the pics of the adapters you sent (thanks!) I suspect the first pic might be the adapter I have now ordered (today), as the second image was the adaptor that I bought last week that did not seem right. I will keep your instructions near in the event that the second adapter is the ticket and assuming I leave the 340 intake on (once I am convinced I won't cook the engine). Again many thanks for taking the time to include pics and instructions. They made things real clear to a welder come gearhead 1st time ...... :newb:
Well as usual I have gotten some great (including pics) information on my question regarding the Intake. I went and got the casting number of the intake which I installed (wish I checked before), and the number 2531915 seems to match as a 340 intake. :oops: Of course I know nothing of what I am doing so that's why all the thank you's. I also got the casting number off the built engine I just finished putting in (it has the 340 intake on it now), and the number 2806030 - 273 - 2 seems to suggest that I have a year 66 block 273. Now if it's true what I hear, that the intake I have on there now is from the 70's I run the risk of water passages being blocked and I could end up cooking the engine, :violent1: Don't want to do that for sure so now I'm on the hunt for a 273/4bbl intake from 1965/66 hoping that will resolve any cooking issues.
I don't know any of this for sure just getting advise.
Now getting to the pics of the adapters you sent (thanks!) I suspect the first pic might be the adapter I have now ordered (today), as the second image was the adaptor that I bought last week that did not seem right. I will keep your instructions near in the event that the second adapter is the ticket and assuming I leave the 340 intake on (once I am convinced I won't cook the engine). Again many thanks for taking the time to include pics and instructions. They made things real clear to a welder come gearhead 1st time ...... :newb:
You should be able to buy a "straight through" adapter for that manifold. They have the narrow and wide mounting holes. Assuming your carb is "narrow" and the intake is "wide", you would remove the intake studs
You would install 4 bolts (hex cap screws) with threads sticking UP into the adapter.
Install the adapter onto the manifold with a gasket, and the SUPPLIED SCREW HEAD bolts which fit into recesses in the one set of holes on the adapter.
Then put a second gasket on top and install the carb. These adapters have "hex" sockets on the bottom of the bolt holes to capture the bolts sticking up, and on the top side, a slight recess in the TOP of the bolt hole so that you can install a short head screw in there and end up flush with the top of the adapter
I don't know who made this adapter, but you can see the recess in the top holes:
Below is the wrong adapter, but shows the hardware. This particular adapter is threaded for the studs. On other types of adatpers, you put the special "low nuts" on the studs, and insert them from the bottom of the adapter. The nuts are captured in the hex molded into the bottom of the holes, and the slot head screws hold the plate down on the manifold
Obviously, this is not needed on modern Carter/ Edelbrock carbs with the two sets of bolt holes
