Re: 65-70 Big Block Exhaust Manifold Bolts
Rick, This set is all the same length and not shouldered. I have shouldered locking exhaust manifold bolts I will be posting. Depending on options...P/S....A/C...the # of bolts required vary per vehicle. Shouldered locking thread bolts started in for some models in late 67 on Corvettes with AIR for the outer 4 ports I have seen some Camaros Chevelles and Novas with shouldered and non shouldered. Here is a picture of a set of mixed hex and shouldered bolts. I'll post more tomorrow.
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