Inliners International Forums General Discussion Engines Casting Number, Help ID Engine

Your second guess at the block casting number 377127 showes up in my listing as a 75-76 250 l6 with integral head. The question maybe does it still have the integral head. They may have kept the stock head with separated intake and exhaust manifolds.

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