Holley Carburetor Identification Codes

 ENGINE
 HP
 OPTIONS
 SERIES
 CHEVY #
 HOLLEY #
327
300
---
4160
3884505
3367
327
300
A.I.R.
4160
3890499
3605
327
350
----
4160
3884505
3367
327
350
A.I.R.
4160
3890499
3605
427
390
---
4160
3882835
3370
427
390
A.I.R.
4160
3892341
3606
427
425
---
4150
3886101
3247