Holley Carb Identification

Chevy carb 3969898

780 CFM vac secondary.

Good carb if it's in good shape

Yea, it ran on the motor we took it off. But it just needs to be rebuilt. Didn't run very well. It's been sitting for 20 years lol. The car it came off is pretty cool. A buddy of mine got it. It's a numbers matching 70 340, 4 SPD duster. The original 340 is gone and it's got a 360 in it but the 4 SPD is still there. Needs some work from sitting but in pretty decent shape. Thanks for all the help. I hope this isn't too much carb for my 318 LOL.