I heard it was only the EARLY (90s?) magnums that had the smog ports.
Here is my 'new' 01 5.2 magnum on the stand with the original 273 manifolds on them.
It's now in the car and running great! but now I'm wishing I knew about those headers...
Absolutely no magnum heads ever had smog ports. Early or late. I bought a brand new Dakota in 93 and it didn't have smog ports. A buddy of mine had a 92 Ram with a 318 mag (1st year for the magnum) and it didn't have smog ports. Your engine looks super.