leels7

Wanting to purchase the correct Holley carb for a 70-72 LS7 motor I'm building. Since the LS7 was only sold as a crate motor, and possibly without a carb, was the LS6 carb used if wanting to stay all GM? The following is the information I have gathered and still trying to sort out.

850 CFM / Dual pump / Center pivot pump
Model# 4150
Part# 3967487 / 3986195 / 3999225 / 3967477
List# 4493/4803/4803-1
Metering block stamp R4559A / R4493A / R4493-1A
Primary 6333 / 6808
Secondary 4519

The numbers in bold are what I believe to be original and correct. I also read that the LS6 Chevelle used the same carb but different part numbers. Any help would be appreciated.
Thanks!

1971 LS-5

Just buy the 780cfm 3310-1 that I am selling. You really won't find a closer carb to what came on the LS-6, and it is easier to adjust. You'll pay big bucks for a factory correct carb that will only be seen when the air cleaner is off. If your motor is not factory correct to your car what's the use?

56and67

The 3310 has a completely different auto choke system and requires a heat tube from the exhaust manifold to work properly. Holley made and sold a lot of over the counter LIST-3418 service carbs, rated at 850 CFM used on L-88s in 1967. They show up used quite often and can be bought fairly cheap. They should adapt to your application well.

early shark

Leels7,

I have an original '71 LS6 carburetor. It is a 4150 model, stamped on the air horn 4803 and uses primary metering block 6333 and secondary metering block 4519. This is what the LS6 Corvettes used.

1971 LS-5

I was talking about the LS-6 carb not the L-88, and yes it does have the hot air choke on it, but if your running an LS-6 intake your home free. I just pulled in the drive with this carb on my car on a Torker II intake that has no choke provision. I just have the choke wired open,runs great. I'll take $150 for it.