Carb suggestions

[mmag36]

I was looking for some advice for my carb selection. I have a 67 gto with the original 400. The motor has been rebuilt, bored .030 over, zero decked and has a mild insky cam installed. Edelbrock performer intake, Doug's headers and 2.5" pypes exhaust purchased. The tech that worked on the engine suggested a Holley 770cfm/elec choke/vac secondaries. Any comment and or suggestions regarding The 770? It seems a bit much for 400hp or less.