[Ron in Quincy]

I am inclined to agree with Bill in reguards to flow testing jets !!!! I do not believe Zenith and Holley flow tested their jets when building the carburetors new for Ford.
Frankly, in rebuilding carburetors the past 30 years I have never flow tested jets, of course, I use original jets, check the orfis for damage, check size of jet openings using the smooth end of torch tip cleaner that I have mic for different sizes by thousands: example Idle Jet .021 , Comp. Jet for early double venturi .018 , etc., check passages ways to be sure they are not plugged.

Many of the new available jets are junk !!!

This is just my opinion and I am sure others will have comments or disagree with me, so be it.

Ron