Factory 1967 big block cars Fan shrouds, Other owners please chim in!!!

I know the 312 is listed as the shroud for 67, but I recall trying to fit a 312 into my car and it did not fit. The guy had a 273 car and put a Hemi in it. I bought the dash harness, an original piece, from him and it was near perfect.
His car was as close to original as they come, but sometimes memory is not.
I'll have to look for some pics of original 383 cars, I know I took a few.
At this point, I am not convinced my car came with a shroud.