I was wondering if anyone had ever had this happen:
Rebuilt 455, new fuel pump,oil pump, etc. The carb
flooded a few times after it was run several hours.
Let it cool down, checked the oil the next day and it
had enough gas in the oil, you could smell it. Didn't seem to
be enough to go above the full mark. I never had one do this
to me before. Any thoughts are welcome.

 

Yes, and they're all bad. Fuel leaking down past the piston rings?


Gasoline will dissolve the oil and reduce its effectiveness. It's not just a matter of that there's not enough gas in the oil to push the level above the full mark. You need to get that gasoline out of there, figure out how it's getting in there, and stop it.

 

If it's a quadrajet carb, it's possible the plugs in the metering rod wells are leaking, allowing fuel to
drain out overnight. I've had this happen before.
This can be corrected by knocking the plugs out and making a "cap" over the well with epoxy.
There may be better methods. This worked for me.

There used to be a little kit available for this, but, I didn't like it.
It consisted of 2 brass replacement plugs with O-rings to replace the old plugs.
A piece of high density foam precut to the shape of the well was supplied to hold the plugs in place.
Didn't seem to work very well, so, I tried the epoxy method which seemed to do the trick.

As Jaunty said, fix it soon. A variety of damage can occur. Cylinder walls can be damaged.
I wouldn't drive it anymore until this is corrected.

 

If it not the carb it's possible for the fuel pump to leak fuel into the crankcase.

Henry

 

Thanks guys. I will check all the above.

 

I just had a similar problem, check out the thread "oil smells like gas"

 

It was the fuel pump. Brand new Autoz#@! JUNK!
I knew I should have gone NAPA
Thanks for all the input fellas...

 

Glad you got it figured out!!!!