Is this 93 pump? Could be fuel atomization issues or way too rich. Whats the AFR? Too cold of a plug? Polarity on the distributor/rotor phasing wrong?
Could be any of the above... swap the wires at
the dist first and see if the timing drops
Even though the cable is GI proof its worth a shot
There was a bunch of those cable made backwards... cut
them and try it worst case you you solder it with some
shrink tubing... one way it picks up on the leading edge
the other way it picks up on the trailing edge
EDIT
On the dyno my W-5 wanted 40* but that was at the
max.. your engine is still looking for more..either
the items above or the cam is retarted...you did go
off the second valve correct(intake)
