[Keith Seymore]

Joining late, you guys just about have everything figured out, but here are my comments:

a) You are correct, ducts snap over the air cleaner base and over the "birdcage" in the radiator support. No clamps.

b) Big block (454) air cleaners had a larger snorkel opening than the small block versions.

c) The difference you are seeing at the radiator support is that one of those is the typical "birdcage", which attaches to the duct on one end and has the protective cover on the other; the other device is an optional "water separator", available by selecting the specific RPO (I don't recall off the top of my head what the RPO was). That's why you won't see that on every truck (should be pretty rare, actually).


K