I did have a lot of blue smoke coming from the tail pipe and I put a 650 Edelbrock on there and it stopped the blue smoke. I now think I have a bad head gasket or crack head or even block. When the engine is cold I open the radiator cap and you can see white foam coming up. The coolant isn't dropping at all just white bubbling, I believe its a head gasket. I also have a really late throttle response too. When I give it come throttle it will take 1-2 secs before there is any rev. Can a blown head gasket make it have a late throttle response like that?

 

does your exhaust smell sweet? is there water in the oil? oil in the radiator? does the car get hot?

 

exhaust smelled like gas until I put a new carb on. The oil seems a little watered down but no milky looking oil. The car doesn't get hot at all.