Engine Block Exhaust "ports," arrangement of

[ChristopherASA]

I've a '90 Ram 50 2.4L (a 4G64 I think). If I understand correctly, there are two arrangements for the -- I don't know what they're really called -- the "ports" from the block running into the exhaust manifold: they can be evenly spaced [ 0 0 0 0 ], or in two offset blocks of two [ 00 00 ]. Does that tell you anything about the engine code (e.g., 4G64 v. G64B)??

[pennyman1]

a 2.4 in the mitsu trucks is a paired port head motor, also known here as the Sirius series motor. The 2.6 is the even port or Astron series motor.

[ChristopherASA]

Been offline for a while and didn't see this till now: thank you pennyman1! /c

[DroppedMitsu]

All 4g64 2.4 and g63b 2.0s have paired ports. All g54b 2.6s have even ports

[ChristopherASA]

Been offline for a while and didn't see this till now: thank you DroppedMitsu!