I have a Edelbrock 600 on my 231 v6 and I jetted it down in all 3 stages if I remember correctly.
Exept one because I didn't have the jet. I gained more power and it runs great also passed I/M easily without cats .
It was my first time jetting a carb and went through the manual 150x to get it make sure it was right.
I got it from Summit and they said Id need 430cfm for my motor but your kinda limited on options at that cfm so I bought the 600.