1970!!! Geez... "0" degrees I think. Better call your local auto parts dealer and ask to be sure.
timing for the 454 engine is 10 degree's at TDC at 700 rpm in neutral or park
The ignition timing for a 1970 Ford Mustang with 302 - V8 - 2 barrel carburetor is : ( 6 degrees BTDC )
Points .017 and spark plug .035
According to my Chilton's Auto Repair Manual : For a ( 1970 ) Lincoln Continental , 460 cubic inch V8 engine The ignition timing is set at ( 10 * Before Top Dead Center )
Assuming this is a truck, if it has a standard transmission, TDC. If it has a automatic transmission, 4 degrees BTDC.
10 * BTDC according to my Chilton's Auto Repair manual for the 460 cubic inch V8 engine in a 1970 Lincoln Mark III
The mark is on the harmonic balancer. The pointer should be visible by looking down from the passenger side of the engine compartment. They're usually bolted to the timing cover.
hot wire on the timing light goes to pos. side of the battery and the neg. side of timing light goes to ground on the engine someplace and then the plug clip goes on the #1 spark plug wire.
Setting Yesterday Free was created in 1970.
Approximately 5 degrees before top dead center if the motor isn't set up for high performance.
According to my Chilton's Auto Repair manual : For the 460 cubic inch V8 engine in a 1970 Lincoln Continental : ( the ignition timing is 10 * Before Top Dead Center ) Also : The spark plugs are gapped at .034 inch The point dwell is 26 to 31 degrees The point gap is .017 inch
Depends on which engine you're referring to, as there were several engine options for the Challenger in 1970.