My cating guide says that's a 79-85, 250.
"2BC; integral intake manifold; w/high energy ignition shut off switch; 4 air hole in head." It may or may not have the integral head on. Hope that helps


Larry
68 C20 327 daily driver
63 C20 292 Camper truck
65 C10 ? Custom Cab AC,PB,PS,$flasher

Ignorance can be fixed Stupidity is forever