Carter bbs 1 bbl

For 1963 225 with a carter carb the numbers are
3236S for taxi Both manual and automatic transmission has 1 9/16 bore
3464s Mt High Performance 1 11/16 bore
3465S for AT High Performance 1 11/16 bore
3466S MT STD 1 11/16 bore
3468S AT STD 1 11/16 bore

These numbers are from the 1963 service manual.