Hello I-sixers
My Chevy 250 with a rebuilt head, offy intake, DEMON 525cfm 4brl, and headers. Stock cam w/ over 145,000 miles. Runs very rough at all rpms, like a misfire but all the plugs seem to be firing. I had it running good and driving good for 2 weeks and then all of the sudden it runs very rough. I just cant seem to figure it out and advice would be very appreciated.
77 stepside, 250ci, Offy intake, DEMON 4brl, headers, ACCEL coil,
I-6 POWER!!!!!!!!
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