Last three number sequences are Number/Code, type, and repair kit.
There have been a lot of questions about carbs, which models were used on various boats, and this info should help.
Starting back in the later years of the Hercules flatheads, and moving forward into the 283 and subsequent variations of the Small Block Chevy, Lincoln motors, and the 427 Ford.
Champion 1955 2 20 6MMGS, 6MSGS Carter 2273 N 1571
Chris Craft 8 A-120-A 325 HP (set Holley DD-5X
Chris Craft 8 A-120 250 HP Holley DD-5X
Chris Smith 1929 8 Schebler 405 S 2.5 1693
Chris-Craft 1934 1936 B Zenith 6920 524.5M2
Chris-Craft 1935 1948 C, C16, Utility Zenith 7141 593.5M2
Chris-Craft 1935 1937 H,HO,HR,HRO,K,KO,KR Zenith 7484 655.5M2 1789
Chris-Craft 1935 Chrysler PC Engine Zenith 6983 524.5M3
Chris-Craft 1936 A, LA, LAO, LC Zenith 8048 556M2 1052
Chris-Craft 1936 1951 L, LO, LR, LRO, MR, Zenith 8044 557M2 1047
Chris-Craft 1937 KC Zenith 8355 556M2 1052
Chris-Craft 1937 1945 KB, KBL Zenith 8351 20B12 2202
Chris-Craft 1939 1955 W, WR, WS Zenith 9183 558M2 1047
Chris-Craft 1939 1955 K, KR, KS Zenith 8983 63M2E12 1028
Chris-Craft 1941 1951 MB, MBL Zenith 7996 558M2 1047
Chris-Craft 1941 1955 A, B, BR Zenith 8963 63M2E10 703
Chris-Craft 1941 1955 MB, MBL Zenith 9776 1047
Chris-Craft 1946 1951 KB Zenith 1484 S 28B12 1019
Chris-Craft 1947 1948 M Zenith 10505 263M2E14 1039
Chris-Craft 1948 1955 KL Zenith 10762 263M2E12 1043
Chris-Craft 1950 1951 KLC Zenith 11168 557M2 1047
Chris-Craft 1954 1955 WB Zenith 11715 263M 1039
Chris-Craft 1955 1956 KLC Zenith 11849 263M2 1039
Chris-Craft 1955 1958 M Zenith 11839 263M2 1039
Chris-Craft 1955 ML, MBL Zenith 11810 263M2 1039
Chris-Craft 1956 1958 KFL Zenith 12055 263M2 1043
Chris-Craft 1956 1958 WB200 Zenith 12031 263M2 1039
Chris-Craft 1956 MLC Zenith 12009 263M2E14 1039
Chris-Craft 1956 1962 K Zenith 12091 63M2 1028
Chris-Craft 1956 1958 KL Zenith 12094 263M2 1043
Chris-Craft 1957 1963 B Zenith 12206 63M2 703
Chris-Craft 1958 8 283 Carter 2669 WCFB 0
Chris-Craft 1960 8 430 Carter 3041 AFB 566
Chris-Craft 1961 8 430 (Lincoln engine) Carter 3204 AFB 0
Chris-Craft 1962 8 283 (Chevrolet engine) Carter 3205 WCFB 547
Chris-Craft 1962 8 283 Rochester 7013071 4GC 1853
Chris-Craft 1962 8 283 Rochester 7015090 4GC 1853
Chris-Craft 1962 8 283 Rochester 7019082 2GC 1854
Chris-Craft 1963 8 430 430 Carter 3314 AFB 566
Chris-Craft 1964 8 283 Carter 3660 06824000 AFB 592
Chris-Craft 1964 8 327 Carter 3660 06824000 AFB 0
Chris-Craft 1965 6 225 Rochester 7025189 2GC 2746
Chris-Craft 1967 8 307 Rochester 7028207 2GC 2747
Chris-Craft 1967 8 427 Carter 4157 AFB 569
Chris-Craft 1968 8 307 307-Q Carter 4695 AVS 1453
Chris-Craft 1968 8 327 327-Q Carter 4695 AVS 0
Chris-Craft 1968 8 327 327-Q Carter 6117 48688 AVS 1340
Chris-Craft 1971 4 153 Rochester 7041187 2GC 2748
Chris-Craft 1972 4 181 Rochester 7042181 2GC 2749
Chris-Craft 1972 8 307 Carter 6310 AFB 593
Chris-Craft 1972 8 307 Carter 6478 06-82-30 BBD 2518
Chrysler 6 Imperial L 125 HP Holley E-6964-M DD-5BR
Data obtained from
http://www.thecarburetorshop.com/MkitABC.htm