273 dilemma

My bet is it was rebuilt as it's not red
I hope you are making a joke, HA- HA!!! Maybe that is a 340 intake because it is painted Hemi orange. Years ago a installed a stock 69' 340 in my 72' van and I painted it blue to match the 72' color, to look original for that year. Block #'s don't lie, Colors do. Does not have to be rebuilt to change the paint colors.