Need Help with 40's carbs, Old 914 FI Guy Newbie with carbs. Options

[majkos1]

am waving a White flag here.

Trying to tune Dual Weber 40's carbs,
some adjustment to all the idle screws,
about two full turns each,
fuel pressure at abou2-3 lbs,
timing at a smooth idle,
Timing marks are way off, I don't know how but timing marks are on two and four.
my guess is improper fan installation, the lil peg broken and previous mechanic threw on the impeller fan on.
#1 firing is in correct position on dist.
verify by valves .

Further hampered by ignition switch not working anymore.
after a few hours trying to figure out why switch not working,
and looking into World's file for clue,
discovered Clay advise to check via Relay board technique ,
am able to get starter to work, (Hot wire to Yellow starter wire) and go back to tune the carbs.

Carbs are still backfiring.
According to the A/F gauge , idle at 12,kinda lean
but rev motor, peg out too rich.

am praying not having to need carbs rebuild.
only history I know of, is one carb was rebuilt.

any good info will be greatly appreciated.

Two goals,
get this 914 on the road, (IMG:style_emoticons/default/driving.gif)
after 15 years on jack stands,
make debut run to Red Rocks.