1996 4.3l pre vortec engine. 175-185hp engine with 4 barrel carb. Engine doesn't have 12 bolt intake , exhaust , water pump , or carb. Engine has two cold weather cracks in front corners of #1 and #2 cylinder water jackets 1.5 inches long did not leak when it was in boat. Engine was running for two years with the cracks. They are probably rusted shut now. I swapped the engine for more HPs.