17054713

[68rs/ss]

Just curious if this carb is worth having. for sale locally and it is replacement carb from AC Delco, new and never used in original packaging. Might be a nice core. Thanks. Phil.

[Kenth]

What is the number stamped on carb?

[68rs/ss]

I haven't seen it as it is posted online. I was told it is same as number on box. 17054713
If I am correct, it is a '84 for GM. Basically, wondering if these replacement carbs would be a good candidate for a performance build with some of cliffs upgrades.

[Kenth]

17054713 is a MPC spare part number and would also have  Delco number 24-3135 on the box.
This unit would be stamped 17054930 and is a service replacement 4MV unit for 1974-75 Chevy/GMC 350cui Trucks.
And regarding numbers, they mean little if anything, it is what you do with the carb that counts.
Properly adjusted/modified for the application this carb is as good as any other 750 cfm Q-jet.
HTH

[Cliff Ruggles]

For the most part any Q-jet can be set up for any application.

Even with that said it is best to pick one that has the features that you want so it's pretty much a "drop-on" without any "cobbling" to make things work.

You need to look at the type of choke.  Divorced choke carbs will require the correct intake, matching divorced choke and rod up to the carb, plus the exhaust crossovers in the intake MUST be open.  That limits their use considerably especially with most aftermarket intakes unless you are just going to run some sort of hand choke to them.

All hot-air chokes will easily convert to electric.

We also need to look at throttle linkage, vacuum fittings and fuel inlet location.  A front inlet carb may not work well on some set-ups as it's pointing right at the thermostat housing and minimal clearance.

I would for sure avoid any 1965-66 carb and any 1967 carbs with the early plunger/bypass fuel inlet set-ups.  They are HOPELESS for high performance work and the weighted secondary air door just doesn't make it either.  They will also be leaking at every single plug in the main casting more times than not.

I would also avoid the 1975 and early 76 models with the aneroid located APT system, especially the models with the aux power piston and single jet/rod in front of the main power piston.  Once again they can be made to work but the later APT models are far superior to them in many ways so I'd go that directly instead if you are wanting a later model carburetor.

Most of the later models that were either hot-air or electric choke are also the larger castings so always a good choice for big HP set-ups.  They did make some smaller castings in the side fuel inlet variety so check them to be sure if you are wanting one to support big HP.

If you are looking at replacing your older Chevy divorced choke carburetor for any reason there are still a lot of 7029207 and 07029207 Service Replacement carburetors out there.  They would be my first choice for a Chevy divorced choke application.  Just as good are the 1977-78 single MAB divorced choke truck units.  Most were 17057213 and 17058213's but there are several other part numbers that will also be the same model........Cliff