79 truck is calling for help

got a 1979 350 4bbl scottsdale that we just from the gf dad put a diff carb on it that we rebuilt (quad puke) but now there is gas mixing in with the oil thought i smelt some before but cant remember ( before carb swap) need help

got a 1979 350 4bbl scottsdale that we just from the gf dad put a diff carb on it that we rebuilt (quad puke) but now there is gas mixing in with the oil thought i smelt some before but cant remember ( before carb swap) need help
1. You screwed up the carb rebuild. Float too high, wrong float, needle 'n' seat not actually sealing, carb well plugs leaking, etc.

2. Defective engine-mounted fuel pump. Common problem when there's gasoline in the engine oil. Usually also means that the fuel delivery to the carb is poor, leading to poor power, stalling, TERRIBLE fuel mileage, etc. Depending on the severity of the fuel pump defect, you may see fuel spitting out of the vent hole in the fuel pump; often it washes away the dirt on the frame/crossmember and so part of the evidence that the pump has shit the bed is a CLEAN spot on the frame aligned more-or-less with the fuel pump vent hole.

got a 1979 350 4bbl scottsdale that we just from the gf dad put a diff carb on it that we rebuilt (quad puke) but now there is gas mixing in with the oil thought i smelt some before but cant remember ( before carb swap) need help

with the engine running see if gasoline is leaking into the engine looking into the carb..

I suspect if the engine is not blowing out black smoke when running it is the fuel pump..remove pump and inspect ....

alcohol in gasoline and these old vehicles is big trouble with the rubber fuel components and the steel tanks..the carb filters need lots of replacing..