72 LT-1 w/ac Carburetor

[Bryan K. Montford]

The GM carburetor number on my 72 LT-1 with a/c is 3999263. Source number= 6239-1. Code= GA. Metering block stamps= 7102, 7101. Date 1B2= 1971, Dec. 2 week.

It seems to match the 72 judging guide with the exception of the code letters GA and it does not have a letter A following the 1 in the source number. The judging guide I have (72 3rd edition)does not list code letters for the the 72 LT-1 and it does not identify with a/c or without a/c.

Is this the correct carb for my 1972 LT-1 w/ac?

There is a carb on ebay that's listing a 6238 carb with 7098 and 3828 metering block stamps as being correct for a 72 LT-1 w/ac car. The 3rd edition judging guide does not list that carb. Does the 4th edition?

Thanks,
Bryan

[Joe L.]

Re: 72 LT-1 w/ac Carburetor

Bryan-----

You have the correct carburetor list number, GM part number and suffix code number for your application. However, I show different numbers for the primary and secondary metering bodies from the ones you mention.

[Bryan K. Montford]

Re: 72 LT-1 w/ac Carburetor

Joe,
The judging manual also list a 6239A with metering blocks 6828 and 4519 as being correct for a 72 LT-1.
Thanks,
Bryan

[Clem Z.]

Re: 72 LT-1 w/ac Carburetor

the -1 carb uses 7102A and 7101A and the non -1 carb uses 4519 and 6828 according to the holley manual

[Terry M.]

Re: 72 LT-1 w/ac Carburetor

There is no different carburetor listed for the 1972 LT1 with AC. The two list numbers (which ARE shown in the 4th edition of the 1970-72 TIM&JG, along with the metering block numbers) are an early and late situation, although that is not specified in the manual. AC or not AC has nothing to do with them.

[Bryan K. Montford]

Thanks for the replies! *NM*