Formula,

I have a 302 with a howard log and 5 of those carbs. I haven't got it runing yet. I am running a progressive 2 primary, with 3 secondary. The guy who rebuilt my carbs told me to try it out like you. I had concearn about the extra carbs contaminating the mixture at idle. He suggested soldering the idle jets closed. I was also concearned that air would slip past the throttle plates. www.Vintagespeed.com sells 97 carb bases that are suppose to address that issue. Good luck. That sounds like an awesome setup.

John