Early and Late Style Air Cleaners?

[Dave K.]

See photo. Different intake, cover etc.

 

[CopperRanger]

The one on the left is a later one, same as the one on my 74.

 

[half cab]

I saved this from another thread ....

66-69 were painted black with the snorkel pointed towards the back and had a hose going to the drivers side oil cap to provide clean air for the pcv.

1970 was blue with the snorkel pointed towards the front and had the same hose going to the drivers side oil cap.

71-72 was the same as 1970 with clean air pcv hose switched to the passenger side.

73-77 were the blue ones with the snorkel pointed off to the side and attached to the cold air tube. The 73 & 74's pretty much didn't have any holes in the area where the filter sits for emissions stuff. The 75-77's had one or two holes in the filter area for emissions related stuff. Finally the 77, the top of the filter didn't have that concave area at the point where the snorkel attaches too.

 

[CopperRanger]

I saved this from another thread ....

66-69 were painted black with the snorkel pointed towards the back and had a hose going to the drivers side oil cap to provide clean air for the pcv.

1970 was blue with the snorkel pointed towards the front and had the same hose going to the drivers side oil cap.

71-72 was the same as 1970 with clean air pcv hose switched to the passenger side.

73-77 were the blue ones with the snorkel pointed off to the side and attached to the cold air tube. The 73 & 74's pretty much didn't have any holes in the area where the filter sits for emissions stuff. The 75-77's had one or two holes in the filter area for emissions related stuff. Finally the 77, the top of the filter didn't have that concave area at the point where the snorkel attaches too.

Good info, Thanks Halfcab. I was wondering about the other years myself

 

[turbotim2]

The 77's had a unique one where the ribs on the top were shorter. The one in the picture on the left may be a 77.

 

[half cab]

The 77's had a unique one where the ribs on the top were shorter. The one in the picture on the left may be a 77.

Pretty sure you are correct. Left one does appear to be a '77.