Check the near the lower center front area for the carb number. It should be
something like 1405, 1406 & etc.
Then go to Edelbrock's web page and download the manual for the performer
series carbs. There is extensive tuning info in the manual.
Look up the stock components for rods, springs and jets. Buy a complete set
for your carb.
Then remove your carb and install all new stock components.