I know this has been answered, but I cannot find it. A 69 cruiser has a 4 wheel disc brake upgrade with a booster and master cylinder. The booster is extended beyond the support on the firewall. The new carb has a secondary that competes for the same space as the end of the master. The answer for the seller was to remove the secondary! I don't want to cripple the carb. I can't find a carb that will work with the booster/master combo, which I also don't want to do without. Considering other carb options. Longer term, I was going to go with a TBI, Holley or Howell or ?. I'm not trying to turn the '74 F.5 tractor motor with a 2F head into a hot rod, just get the best out of the engine rebuild without sacrificing braking. Thoughts, anyone? TIA.