I bought my truck recently and was checking out the engine and carb. What was the original carb that came with the 390 back in 1968? The carb on it currently is an Autolight 2 barrel.

Thanks for the help,
Matt

 

Truck engines came with the 2v. 2150 model. Low compression 8.6:1

 

Autolite 2100 2 bbl was the O.E. carb. Or if you got lucky it could have had a Holley 2 bbl. The 2100 came in about 5-10 different sizes, from a .98 throttle bore to a 1.33, the 1.08, 1.21 & the 1.23 are about the most common. This number is cast into the driver's side of the fuel bowl, behind the accellerator pump linkage rod.