What altitude are you at? from seal level to about 2000 ft i would set at 4
and add 2 deg for every 1500 to 2000 feet.
On the front of the timing chain cover, drivers side towards the top of the harmonic balancer.
6 or 8 drgee
There is no timing belt on a 305 unless it is an aftermarket belt drive system.
same as a 350
6 degrees BTC
Top Dead Center
The easiest way is to look at the Harmonic Balancer. The 305 has a wider thicker balancer than the 350. Pus the timing tab on a 305 is located ON the timing cover and the 350 is bolted on the with the cover bolts. Riky9
8 degrees.
counter clockwise.
32 degrees
6 BTDC
Timing Advance not working or fuel sensor messed up.