295 spec numbers need help with info

[Steven Rempel]

OK i have a few diff 295's motors with different spec numbers and would like to find out what the different are between a spec number like 118006 and 118011
292402 and 292403,
i have to replace some parts like the fan housing and i see that the 118spec numbers have a much smaller hole for the harness to fit the plug through compared tot he 292spec
is there a pdf that explains what all the numbers mean and what options would have been on those motors?