Chevy 350 problems preignition

Hey guys, i recently rebuilt my 1978 ponitac firebird chevy 350 motor. I put 10;1 compression pistons in it, thats all i did performance wise. For some reason, when i get the timming right and put the car in drive, it will stall. I will adjust the idle and it will not help. I will advance the timming and it doesn't seem to change. I got it to the point where if i come to a red light, my rpms just keep dropping but will not stall, also my oil pressure will drop too. Off the line the car is very hesitent too. I also put $10 of gas in and only drove no more then 30 miles and i am out. That doesn't seem to be normal. What can be causing all of this?

Man you really need to check the valve timing, firing order, valve adj. thats really crazy, maybe a huge vacuum leak, are you dumping fuel down the carb maybe? if thats the case is it running into your oil and thinning your oil and destroying your motor?

I think that checking comp with a guage is wise.You may have 10.0:1 pistons but has your block been decked,or your heads been shaved?You could have as much as 11.0:1 which is way to much to run properly on pump gas.