The part numbers on air cleaner stickers were for the full air cleaner assemblies (base, lid/silencer, lid/silencer seal, breather element, breather element clip, vacuum hose between cleaner base and ThermAC, vacuum hose between ThermAC and carburetor, and air filter, as applicable) and not just the air cleaner base. The assembly did not include the wing nut, engine cubic inch/horsepower sticker(s), cleaner base modifications for heavy duty closed positive crankcase ventilation (RPO KD5), or arrestors for open ventilation cleaners.
Part number 6424492 is for a 1967 327/210 HP V8 engine with 2 barrel carburetor, A.I.R., and 1st design with two tubes. For 1968, the following air cleaner assemblies were for 327 engines:
LF7 Engines:
- 327/210 HP V8 auto with 2BC: CH 6424425, A169CW filter.
- 327/210 HP V8 manual with 2BC: broadcast code unknown, 6483655, A329C filter (per 68 AIM UPC 6/C7).
- 327/210 HP V8 manual with 2BC: broadcast code unknown, 6483653, A329C filter (superseded 6483655 per Parts Catalogue No. 681A (Nov 67), Group 3.402). Assembly line superseded date unknown.
- 327/210 HP V8 manual with 2BC: CJ 6484218, A329C filter (superseded 6483653 per Parts Catalogue No. 681A (Nov 67), Group 3.402). Assembly line superseded date unknown.
L30 Engines:
- 327/275 HP V8 auto with 4BC (Turbo-Fire): broadcast unconfirmed as CL, 6484220, A348C filter.
- 327/275 HP V8 manual with 4BC (Turbo-Fire): broadcast code unknown, 6484221, A348C filter.
Hope that helps!
Bernie