350 crate engine was great but now stalling

[LordDevlin]

So I got the plates on my truck finally last week and it has been driving pretty well... until this evening.

All of a sudden it seemed like it wasn't quite taking the gas right... other times i would give it gas but nothing would happen except its like I could hear the gas being fed in, like liquid from a tap.

then the truck just stalled altogether, did this a few times but would start up again and drive for a bit until it would stall again. Then it would start but not keep running, and would run rough for a few seconds and then stall again. Then finally I got it to stay running to drive it home.

Since I've had it (Feb 16), it has only been filled with 87 gas for running it in the garage, and for the past 5 days actually on the road. Earlier today i put in 91 and filled it. I drove it most of the day though around town before this happened (20 miles perhaps). Could it be the higher octane gas?

its a 350 crate engine with a cam, with a 4 barrel edelbrock carb. LIke i said, just got this truck. My father and i are used to 235's and most recently a 283 and 336, but never anything along the lines of this "performance" setup. Not too familiar with this newer stuff.

Any help or suggestions would be appreciated.

Thanks.