Tuning my 360 la motor

Veeeeeeeeeeeery poor choice for 3.23 gears + street use.

Timing.
To keep yourself sane from the rough idle, it will need a LOT of initial timing. I am not going to waste time typing out the procedure, so try this & report back for more info.

Engine idling with factory timing [ about 8-12* ], turn dist slowly CCW to advance the timing. Idle will get smoother & rpm willl increase. Stop when you have the highest rpm & check what the timing is. Do not be surprised if it is 40+*.