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Hey guys, I have a 79 D100 w/a 318, I just did the compression test to see if I needed to rebuild or if a head job would suffice. The issue I'm having is all cylinders are only putting out 35psi. I'm confused because I know it should be at about 110psi, but the truck runs smooth, still has power...

Hey guys, nice looking forum here. Have a 79 D100 318 custom bed pickup. It's been stripped for weight by the prior owner for a drag truck he never completed; I'm in the process of getting it back on the road.