460 timing

[OttoP]

I have a 78 RV based on ford truck chassis with a stock 460 engine-4barrel carb. Anyone know what the initial timing should be set at?

[MagicRat]

My manuals show initial timing (as measured with the vacuum advance disconnected at the distrubutor) of 16 deg. BTDC.

These is a note that engines made after July 15, 1977 get 10 deg. I suspect this is emissions-related. Using 16 degrees will get you a bit more power and fuel economy so long as it does not ping.

IMO try 16 degrees and back it off a degree or two if you hear any knock or ping.

[OttoP]

Thanks!!!