Edelbrock throttle bore sizes ?

69 Cuda 440 said

Edelbrock Performer #1403
* 500 CFM
* Primary ........ 1 7/16" ...... Venturi ... 1 3/16"
* Secondary .... 1 11/16" .... Venturi ... 1 9/16"

Edelbrock Performer #1400
* 600 CFM
* Primary ....... 1 7/16" ...... Venturi .... 1 3/16"
* Secondary ... 1 11/16" .... Venturi .... 1 9/16"

Edelbrock Thunder #1806
* 650 CFM
* Primary ....... 1 7/16" ...... Venturi ... 1 3/16"
* Secondary .... 1 3/4" ....... Venturi ... 1 5/8"

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Do you have the 500 cfm Thunder 1801 ? info
And looking at your info on the 1403 and the 1400 they are the same, but a 100 cfm difference ????