Carter Thermoquads ~ 'More General Information'

old thread but worth reviving, question:
the list of "good" solid fuel metered TQ carbs,
why is #6090 not in the list ? It's a factory 400 cid carb,
with the larger 1.5" primaries, 850cfm
how bad can it be ?
question to 69 cuda 440,
is your list based on only the carbs you found, and used yourself ?
YES, I would exclude any carbs marked "CA", as they are California emissions.
no doubt leaner, with early emissions controls.
but what's wrong with all the other 72-74 TQ carbs ?
any of them should work, when dialed in with jets, rods, etc.
what makes some of them undesirable and not on your list ?
there's many pre-'75 TQ to choose from. what makes them good or bad ?
any should work. I'd prefer the 1.5" primary for extra 50cfm, no ?
the 6090 is the earliest 850 they made with solid fuel metering.
one would assume it has the least amount of emissions bs on it,
and would be metered the richest from the factory,
being these carbs were progressively metered leaner with passing years,
as the Federal/State emissions standards were tightened.
please explain. because if you haven't actually TRIED every single pre-'75 carb,
how can you recommend only that short list you posted ?
finally, I find it hard to believe, that any production TQ,
has more potential than an early Competition Series TQ,
because the early CS series were designed for racing, no holds barred.
they have the richest metering of any made, period.
I obtained many of them, and kept all the 1000cfm units, and one 850 center section. Both jets being in the top lid, eliminates the possible O ring sealing issue in the base, that the later TQ's experienced.

Model Application Pri. Sec. Rod Bore Kit
4846S Competition Series 331 341 615 1-1/2 8
4846SA Competition Series 3080 3116 615 1-1/2 8
4847S Competition Series 331 341 616 1-1/2 8
4847SA Competition Series 3089 3116 616 1-1/2 8
4972 71 340 MT (3512820) 3074 3125 655 1-3/8 6
4973 71 340 AT (3512821) 3074 3125 655 1-3/8 6
6090 72 400 AT F (3614139) 4095 5137 1937 1-1/2 1
6138 72 340 MT F (3614122) 4095 5137 1940 1-3/8 1
6139 72 340 AT F (3614123) 4095 5137 1940 1-3/8 1
6140 72 400 MT F (3614138) 4095 5137 1939 1-1/2 1
6144 72 340 AT Export 4095 5137 1950 1-3/8 1
6165 72 400 MT CA (3614172) 4095 5137 1938 1-1/2 1
6166 72 400 AT CA (3614173) 4095 5137 1938 1-1/2 1
6318 73 340 MT F (3698327) 4098 5137 1962 1-3/8 1
6319 73 340 AT F (3698328) 4098 5137 1966 1-3/8 1
6320 73 400 HP MT F (3698332) 4098 5137 1965 1-1/2 1
6321 73 400 HP AT F (3698333) 4098 5137 1966 1-1/2 1
6322 73 440 & Truck AT F (3698334) 4098 5125 1966 1-1/2 1
6324 73 440 HP AT F (3698336) 4098 5125 1966 1-1/2 1
6339 73 340 MT CA (3698339) 4098 5137 1962 1-1/2 1
6340 73 340 AT CA (3698340) 4098 5137 1966 1-1/2 1
6341 73 400 MT CA (3698342) 4098 5137 1965 1-3/8 1
6342 73 400 AT CA (3698343) 4098 5137 1966 1-3/8 1
6394 72-73 340 AT Export - - - 1-3/8 1
6410 73 440 & Truck AT CA (3698319) 4098 5125 1966 1-1/2 1
6411 73 440 HP AT CA (3698329) 4098 5125 1966 1-1/2 1
6446 M-440 Chrysler Marine (3698397) - - - 1-1/2 1
6452 74 360 HP MT F (3751433) 4098 5143 1962 1-1/2 1
6453 74 360 HP AT F (3751434) 4098 5143 2005 1-1/2 1
6454 74 360 HP MT CA (3751435) 4098 5143 1962 1-1/2 1
6455 74 360 HP AT CA (3751436) 4098 5143 2005 1-1/2 1
6456 74 400 HP MT F (3751439) 4098 5143 1966 1-1/2 1
6457 74 400 HP AT F (3751440) 4098 5143 1966 1-1/2 1
6459 74 400 HP AT CA 4098 5143 1966 1-1/2 1
6460 74 440 AT F early (3751443) 4098 5137 1966 1-1/2 1
6461 74 440 AT CA early (3751444) 4098 5137 2005 1-1/2 1
6462 74 440 HP AT F early (3751445) - - - 1-1/2 1
6463 74 440 HP AT CA early (3751446) - - - 1-1/2 1
6488 74 360 AT CA early (3751451) 4098 5143 1966 1-1/2 1
6489 74 400 AT F early (3751452) - - - 1-1/2 1
6496 74 400 AT CA 4098 5143 2005 1-1/2 1
6503 74 400 AT Export - - - 1-1/2 1