Re: Holley 4777 vs. 6210
The 6210 is basically a Q-jet replacement carb. I have nothing to back this up, but have heard that it's not Holley's best effort. Spread bore double pumper.
The 4777 is the old tried and true square bore double pumper - great carb, but not the best for fuel economy, if that's what you're after. (I use a 4778 - 700 CFM - and I love it, stinky idle notwithstanding) The 4777 as delivered won't have a choke. (I think) Oops - looks like I'm wrong on that!
The 3310 is another tried & true Holley - square bore, vac secondary 750 CFM and will run well on just about anything.
Some also like the vac secondary Holley Street Avengers
Either of the dual feed Holleys (4777, 3310, Street Avenger) will require the appropriate fuel line set. The 69 Z/28 repro set will work great. (Be careful on the 3310 - some are 4160 style with a metering plate on the secondaries, which requires a shorter secondary fuel line)
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