Sounds like a valve might be sticking. Do like mike says. Run a compression test. With insulated pliers pull one plug wire at a time & see how much it effects the running. If you can isolate the cyl/s causing the problem it might lead us to the cause.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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