Hot Rods Rodchester jets

Hi All,
Does anyone know or know where to look for jet spec for a 61/390 Cadillac with a 4GC Carb. Thanks I am having no luck finding specs to help tune my carb.

 

https://quadrajetparts.com/index.php?osCsid=be2e19231de146c23ed9be00a0ac85e5

best by far for parts and I'm sure they'd have the specs you're looking for

 

Do you have the carb number? I have jet specs that are listed by carb number.

 

Part numbers- primary 7002658, secondary- 7008678. Don't know if that indicates 58 primary, 78 secondary or not.
Edit; after a little more digging I did find info stating the last 2 digits of part # are the stamped jet number.