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Re: Can someone post engine pix
unless I'm loosing my mind... I just removed my factory original(never touched prior) exhaust manifolds out of my '84 in October and don't recall any square headed bolts. As stated above though there are a few possibilities such as pipe plugs where the A.I.R. tubes once were, or the inverted style which would only be in the passenger side head from the factory.
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"Horsepower is how fast you hit the wall, torque is how far you carry the wall with you."
'84 chevy half ton short box 2wd, 67,000 actual miles 
'03 chevy 1500 HD crew cab 4x4 standard box, 6.0L
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