21.04.2009, 10:12
Hello Carsten,
Are you trying to get the stock timing settings? Is the car an automatic? Probably around 4 BTDC degrees in drive at around 800 rpm or so with the vacuum hose unhooked and plugged. I don't think your engine combination is original so you can't really cross reference. Camel hump heads I think were until 68 and had no accessory holes. Where the 71/72 motor has accessory holes in the head. If you are looking for the best perfomance just keep advancing the timing a degree or so at a time until you start loosing mph at the track. BTW. try to use ported and manifold vaccum with the vacuum advance. My 70 pickup likes ported vacuum the best since manifold vacuum advances the timing too much for starting but it does keep the plugs cleaner and allows you to close the throttle blades more on the carb.
Cheers,
Are you trying to get the stock timing settings? Is the car an automatic? Probably around 4 BTDC degrees in drive at around 800 rpm or so with the vacuum hose unhooked and plugged. I don't think your engine combination is original so you can't really cross reference. Camel hump heads I think were until 68 and had no accessory holes. Where the 71/72 motor has accessory holes in the head. If you are looking for the best perfomance just keep advancing the timing a degree or so at a time until you start loosing mph at the track. BTW. try to use ported and manifold vaccum with the vacuum advance. My 70 pickup likes ported vacuum the best since manifold vacuum advances the timing too much for starting but it does keep the plugs cleaner and allows you to close the throttle blades more on the carb.
Cheers,