Quote:
Originally Posted by BUBBAS IGNITION
Yes the Harmon Collins adjustment plate fixed the issue of not having adjustable timing. ( at least not easily adjustable  )
Many figured out the mods to allow some increased spark timing and advance, but in reality there was another constraint, and that was "rotor phase" you can only move the point set so far until you have spark scatter with the rotor being out of phase with the cap contact!  |
Is this why Chevy sixes had the vacuum advance move the whole distributor body? I've often wondered why they did that.