need opions on motor

man...you give us a tough one. I will bite. How many miles are on your setup? Did you buy the car recently and can you give us some more history on it?

How far are you from home?

Without knowing anything else...I am going to assume your timing chain has past its allowable tolerance, and your timing is jumping around erraticly causing your carb to run Erraticly.

Could be something else, but 318s are NOTORIOUS for this.

Bring on your specific info....