Well, I found the source of the knock finally. Number 1 rod had no bearing on it, the number 4 rod bearing was spun. Good news is that someone bought a lot of aftermarket goodies for it. ARP Main studs, ARP head studs, Sealed Power Hardened Hyper Eutectic pistons .20 over, and what looks like an aftermarket rod set. It also has a BBK 75MM throttle body, magnaflow exhaust and a B&M Short throw.