Help Identifiction of this engine

This engine is in a 1976 RV, only numbers I can find are on the intake in front of carb 3671216.
Thanks

 

Big block Mopar. 361-440CID

 

green.. 413 was used in a lot of early motor homes

 

I saw the following MOPAR engines in RVs back then

318
413
440

Given the year model it likely came with a 440.

 

I just read that the 413 was produced for heavy trucks until 1979. It is a contender for this unit.

 

If you look at this incomplete list covering up to 74 you can see the similarity in the intake numbers.

http://www.mymopar.com/intakecastnumb.htm

 

At first read, I thought it said '76 Riv
LOLOLOL