9002S Thermoquad carb

Better! I try for the ones that have the fewest vacuum ports and the earliest years. The truck TQ's have less vacuum ports since there standard emissions were higher. Cars were lower.

If the TQ has 1-1/2 primaries, there considered an 850.

TQ's must be set up right before they hit the intake manifold. There are many external adjustments that have to be met first. It is just easier to do on the bench. It beats leaning over the fender.

Remember to use a thick gasket. The thin paper ones are garbage and throw the TQ's choke out of whack. If your going to use the stock choke, the thick gasket is a must. Setting up the carb as a manual choke is a pain and ugly looking.

Tuning parts are a pain to find and jets by the self are pricey. With big cams, or just more accurately cams with a lot of overlap and radical idles are hard to tune in no matter the carb used. The TQ has a single spring in the center. You can use AFB springs if your a little slick.
Deleating the spring is t the end all ethier. The TQ has a cam in the base plate throttle body section designed to give lift to the rod tree no matter what the vacuum signal is reading.

Always replace the 2 metal tabs after you swap rods.
Adjusting the rear air door is a weird acting mod. When you watch the AF ratio on a gauge, it'll drive you nuts playing with the secondary air door.
You can redrill the secondary jets easy enough.

Once you get it all dialed in and learn it some, your more than likely going to really like this flexable forgiving carb for its throttle response and WOT ability. There not for everybody or just any combo.