I'm in the process of rebuilding a 225 out of a 1974 van. I've hit a bit of a hiccup, since I do not know what this part technically is. It bolts to the end of the intake next to the carb. I was hoping I could get some insight into what the part is called and where I can find a replacement.

You can replace that with a flat piece of steel with 2 bolt holes in it.

Its an EGR valve.

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Yeah....Im the one who destroyed this rare, vintage automobile.....

EGR valve. You should be able to find a replacement at any well stocked parts store.

Maybe, but don't bet on it—the poster is in California, where the rules generally forbid the removal of emissions-related equipment. Vehicles older than 1975 are (currently) exempt from the Smog Check program, so violating the do-not-remove law likely won't be discovered on a '74 van, but the law's still there.

As for what to replace the EGR valve with, if the original poster wants to keep the EGR system working, see second paragraph here.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks for the help everyone. Dan, the engine came out of a 74 but it's going into a 70 swinger, so smog and emissions are no issue for me, I suppose I should have included that.

In that case, by all means block it off with a homemade or purchased Slant-6 EGR blockoff plate.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.