AFIL - 61 - 64 - all 2bbl engines - 
Wix 42111
Fram CA168PL
AC AC131C
NAPA 2111
Lee # AFL-48.

58 - V8 - 289 w/ 4 bbl -  LEE AF46 / NAPA 2111.   (1/8" less height)apr2004

AFIL - R1 engines - 
Baldwin PA1828 
Hastings AF127 
Motorcraft FA41 
Fram CA114
AC335C fits but "small" only 300cfm or even less.
FIAAM FL6827  
NAPA 2058 or 2079
K&N - E-1560 
Big A  206 
AC AC335C
Note added June 2009:
(Air Filter 63-64 Avanti = 58-59 Thunderbird & 64-67 Mustang)
Apco, part #AA181C. Supposed to interchange with Fram #CA181PL, AC #A55C. Measures 13 11/16" outside diameter, 11 1/4" inside diameter and is 2 1/8" tall. This is older inventory – appears OK. Supposed to fit:
1962 - 1964 Studebaker Avanti V8 (JT-R1 eng) with 4BBL carb
1969 Fairlane 427 4BBL / 1964 - 1967 Mustang V8 High Performance / 1967 Fairlane 427 4BBL
1966 - 1967 Galaxie 427, 428 & 7 liter / 1965 - 1966 Ford Police Car 428 / 1965 Fairlane V8 289 HP
1964 Falcon V8 Sprint Special / 1963 - 1964 Fairlane V8 4BBL / 1964 Galaxie Police car 390
1961 - 1963 Ford Police Interceptor 390 / 1959 Thunderbird V292 engine with governor 
1957 - 1958 Thunderbird V8 4BBL except late 1958 / 1968 Mercury Cougar 427 4BBL
1967 Mercury Comet 390, 427 4BBL / 1961 - 1967 Mercury Police cars V8 427
1966 Mercury Comet V8 390 4BBL


AFIL -  R2  engines uses 2 filters
NAPA #2112 
FRAM CA102 
K&N's 1-piece E4600 - equals 2 of the standard units
 KN E3346 should work.  ( 2 pieces)
Big A 1140  
AIC  A176C 
NAPA   2112 
Lee AFL 102
Fram  CA 102PL
Puralator AFP58 2 Required 
NAPA 2058
Ford C75F 9601A
Fram CA 181PL
Autolite LFA 20  

AFIL - 63 - 64 Avanti  R4 
 Big A 206 
 NAPA 2058
 Fram  CA 181PL 
AC  A335C
 Ford C75F 9601A 
Autolite   FA 20 
 AC A350C



R4 air filter: 
R4  A/C - #A335C NAPA - #2058 FRAM - #CA181PL




259/289 4 bbl - Air filter
NAPA        2111
Hastings    AF46
AC          A131C
Baldwin     N/A
Motorcraft  FA33
Wix         42111
Purolator   N/A
Fram        CA168PL
AMC         8990838
===========
-  6 CYl Champ - Wix #42112 / Purolator # A20058 /AutoZone STP #

========================

59-64 Hark and Lark 2 barrel carb - Air filter is FRAN CA168PL (68-70 Rambler)  (myers/tw Nov 78)
============
Apr 2008
1964 6 cyl - AC A117C  (Ford Falcon 60-67,Ford 6 cyl 62-67, Rambler 6cyl 64-67, Stude 6 cyl 1964))

Lark 62-63 - Atlas A-27
63-64 Avanti R2/ Lark, Hawk R2 - Atlas A-27


+=========================
Feb 2010
4 bbl. air cleaner (WCFB), is a Fram 168 PL.
2bbl. air cleaner (Stromberg WW) is a NAPA 2111.
The CA-168PL Fram actually only fits '59-60 4Brl. Air Cleaners with the LARGE
 diameter short snorkel CORRECTLY, it will fit the '61-'64's with the small 
diameter snorkel, but is a little too tall, that Studebaker element and 
replacements have been discontinued years ago.

StudeRich