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    I have a 1981 chevy pick up w/ a 305 v8. I took off the stock exhuast and installed headers and now it don’t want to run. It acts like it has a computer controling everything but the only thing I can find on the engine is a knock sensor. The truck had some of the smog stuff taken off but it ran good until the headers. I found a small box under the dash and if I unplug it the truck won’t run. Also when I put the headers on the oil pressure stopped working. I found a sending unit on the side of the block as well as the back. I am totaly confused. Any help would be very much appreacitated. chuck:confused:

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