Gotta get this sorted out!

which is why one thing/issue at a time is more revealing of the actual problem, but the carburetors tune was more than likely the issue. Youre back to the same plugs you started with except new, was good to rule out arcing with re routing the wires. Unfortunately no clear answer for the next guys similar issue other than changing all your plug wires , plugs, and buying a new carburetor.