carter-edlebrock-holley????
Alllllllllll righty then!
The 4160 should be a 600 cfm carb. Not a 390.
The OE carb is supposed to be a ????
The current Edelbrock carbs are very good street units that can take a good tweak so they can run with bigger than normal cams. There modifiyable, but that isn't so easy.
You have a wide verity to chooose from up to 800 cfm's. Not bad huh?