Hi All
I have the ID sheet for the Q-J but I see alot of numbers posted wit a suffix #... Example 7029215 then EH

We se this is a 1969/49 state/Chevrolet/Manual transmission..
But what does the EH stand for and where can I find some kind of index for this suffix?

Im involved in a desperate search for a Q-J for my 73 L48 and I am trying to figure out exactly which carbs will work

Thanks
Bob

 

Looked through all of My reference books but came up dry as to
meaning of suffix. Not one of them even mentions any kind of suffix.
This may be a question only Lars can answer.

 

Thanks Chevylit
I am just trying to see if I can find a Quadrajet that will bolt on my L48 and run good
This is all very confusing to me as to what rods jets ect: I need

Thank you for the reply

 

A small block quadrajet with 73-74 main jets, 44 main rods and DA secondary rods should get you in the ball park. God bless, Sensei

 

Any q-jet that starts with a 7 and not a 1 will work. You can get the rods and jets from Edelbrock or carburetion.com and tune as necessary.

 

Any 71-74 Chevy passenger car Q-Jet will run just great, and all carbs in this year range look identical and have the same choke setup. The carb numbers and applications you can use are as follows:

7041200 CHEV 71 CHEVELLE 402/454 AUTO
7041201 CHEV 71 CHEVELLE 402/454 MAN
7041202 CHEV 71 CHEVELLE 350 AUTO
7041203 CHEV 71 CHEVELLE 350 MAN
7041204 Chev 71 454 AT VETTE
7041205 Chev 71 454 MT VETTE
7041212 CHEV 71 Vette 350 A/T
7041213 CHEV 71 Vette 350 M/T
7042202 CHEV 72 350 CHVL & VETTE FED A/T
7042203 CHEV 72 Vette Fed M/T 350
7042215 CHEV 72 CHEVELLE MAN
7042216 CHEV 72 Vette A/T 454
7042217 CHEV 72 Vette M/T 454
7042220 CHEV 72 CHEVELLE AUTO
7042902 CHEV 72 Vette Fed A/T 350
7042903 CHEV 72 Vette Calif. M/T 350
7043200 CHEV 73 454 all A/T
7043201 CHEV 73 454 all M/T
7043202 CHEV 73 350 all Auto
7043203 CHEV 73 350 all M/T
7043212 CHEV 73 Vette Hi Perf. Auto
7043213 CHEV 73 Vette Hi Perf. M/T
7044201 CHEV 74 454 CHVL ALL M/T
7044202 CHEV 74 CHEVELLE 350 AUTO
7044203 CHEV 74 CHEVELLE 350 MAN
7044206 CHEV 74 Vette & Nova Fed A/T
7044207 CHEV 74 Vette & Nova Fed M/T
7044208 CHEV 74 350 Camaro Hi Perf. A/T
7044209 CHEV 74 350 Camaro Hi Perf. M/T
7044210 CHEV 74 Vette 350 Hi Perf. M/T
7044211 CHEV 74 Vette 350 Hi Perf. A/T
7044221 CHEV 74 454 VETTE ALL M/T
7044223 CHEV 74 454 MONTE, VETTE & TRUCK FED A/T
7044225 CHEV 74 454 VETTE FED A/T
7044226 CHEV 74 WAGON 400 AUTO
7044500 CHEV 74 454 MONTE, VETTE & TRUCK CA A/T
7044502 CHEV 74 CHEVELLE 350 A/T CA & TRUCK
7044503 CHEV 74 CHEVELLE 350 M/T CA & TRUCK
7044505 CHEV 74 454 VETTE CA A/T
7044506 CHEV 74 Vette & Nova Calif. A/T
7044507 CHEV 74 Vette & Nova Calif. M/T
7044526 CHEV 74 400 CHVL CA

 

Thank you Lars
I was wondering why After I put my jets/primary and secondary rods from my original 73 (the ball valve hole is stripped in the float bowl) in a 1978 QJ it ran like crap.

Thank you very much Lars

 

the EH suffix and the carb# indicate it is for a 427/390 engine, 1969 4spd (L-36). Might fetch a decent sum on ebay from a bigblock owner.

 

OK
Please tell me how you figured this out

 

According to the Corvette by the numbers book, the 7029215 is a 69 427/390 4 speed carb. Also, the book says "The 2 or 3 letters that usually follow the stamping numbers designate the code Chevrolet assigned to that carburetor. There are no records to indicate which letter codes corresponded to specific plants. The correlation to the actual carburetor application to this code is the same code as shown on the car's original assembly line sheet".

It may be worth alot of money to someone looking for a period correct carb.

 

carb #s and those letter codes are listed in the NCRS tech spec and judging guide for 68/69.

also a good website for carb#s is:

http://www.blake.com/oemcarbs/partlist.htm


Is that the carb you have, or was that just a "for example"?

 

Just an example
Its for sale on Ebay though

 

The 73 parts do not interchange with the '78 parts - you cannot swap the components (rods are different lengths and jetting requirements are completely different).

 

Thanks Lars
I found a guy (Someone I went to school with) with quite a few Q-J's from 68-74
I will be meeting with him this evening
He said $100 for a working carb and $300 if i want one completely rebuilt.
Im not sure what to look for other than the correct serial# ..the correct secondary rods..DA I believe, And worn throttle plate shafts..... If you read this thread within the next couple hours maybe you can give me a few pointers before I go and open my wallet
Thank you for setting me on the right path
Bob

 

You know you can get most of the parts for the pre-75 q-jets new from Edelbrock.

 

Thanks Kalway
Good to know
I only have Q-J's in rebuildable condition from 1978
My original 73 has a stripped hole where the check ball (or whatever its called) screws in.

 

You can get parts for the 4ME (post-75 q-jets) but the primary metering rods are incredibly tough to find in the right size. You can go on ebay motors and search "metering rods" and JJ's Smoking Deals may have a few left. You want any of them that are below 50 and end with the letters p or k. These have the correct sized power tip and are ideal for corvettes. Jets are easily found and a dime a dozen.

I'm currently using an Edelbrock 1904 (4ME type) and it was tuned by lars. I recently changed the primary rods to 47k and am using 75 primary jets. It works great on my '81 that's computerless.