Have a 454 420 HO turning 5100 WOT Have a 750 Mech Secondaries I am running 73's primary and 84's secondary with 6.5 powe valve primary only, is this enough secondary jetting as base to start??????????

It seems I read people are running 90's in the secondaries?????

WOW. I have the same question, only with the stock Weber carb. Can I tag along on your post? I'm gonna start with .107 secondaries, but i'm not sure about the primaries.....

thanks.!