difference between 440 Intakes 2951736 and 2951736-1

[moparnorth]

Happy New Year to all.

What is the difference between 440 Intakes 2951736 and 2951736-1 and which is correct for 1970

 

[PurpleBeeper]

a search showed the first number is correct for 70-71 440.
Casting Numbers - Big Block B/RB (mopar1.us)
Mopar Casting Numbers - MyMopar.com - Mopar Part Numners

I don't see any "dash 1" numbers, so maybe that's a shift or revision or ??? My "guess" is that both are correct, but I'm not sure

 

[moparnorth]

a search showed the first number is correct for 70-71 440.
Casting Numbers - Big Block B/RB (mopar1.us)
Mopar Casting Numbers - MyMopar.com - Mopar Part Numners

I don't see any "dash 1" numbers, so maybe that's a shift or revision or ??? My "guess" is that both are correct, but I'm not sure

above photo shows art number 2951736-1

 

[PurpleBeeper]

I already believed you, but dash one isn't listed in parts lists

 

[1968rt]

When they reset the casting molds, they up the revision. So lets say they cast 500 manifolds then they make an adjustment. That becomes -1 and so on. I have seen block revisions up to -10