I have a handle on a set of TBI heads (mixed casting numbers). One is a #193 head and the other is a #191 head (14102193 and 14102191). I am told they are both the same valves, ports, and chamber CC's. From what I see the 191's are 76cc and the 193's are 64cc. On GM replcement engines I see the 193's on the 5.7L 350 in <8600 GCVR vehicles and ...Chevy 5.7 Gm 350 Cylinder Heads Pair Tbi 87-95 191 193 W Head Set Bolts Aug 26, 2019 · Namas R, Ghuma A, Hermus L, Zamora R, Okonkwo DO, Billiar TR, Vodovotz Y. The acute inflammatory response in trauma / hemorrhage and traumatic brain injury: current state and emerging prospects. Libyan J Med. 2009 Sep 1;4(3):97-103. doi: 10.4176/090325. Computer-controlled emissions systems became standard on all Chevy 350 engines in the early 1980s, with throttle body fuel injection becoming standard around 1988. Chevy 350 Engine Specs The Chevy 350 engine is a 350 cubic inch (5.7-liter) small block V8 with a 4.00 and 3.48 inch bore and stroke.