What are the dimensions of F10194?

Product Description: 1977-81 Pontiac Trans Am; Shaker Hood Scoop Base; with 403 Engine

Measurements:

20-5/8" - back to front of circle
16-1/8" - left to right
13-3/4" - hole dia.
16-1/2" - underneath retainer
7/8" to 1-1/2" - height

F10194