Truckernix
Yes definitely. I put the rochester on and after some fine tuning the truck increased about another 10% in power and pick up (so I am up about 30% in total. I still have some more tweaking to do.
It is stumbling at high rpms again (but just slightly) so I checked the timing as well. If you remember I had to advance the timing about 10 degrees to get it to run to take it back for service.
The mechanic who serviced it told me the timing was way off (duh) and that he set the timing, valves and carb settings (old carb) after changing the head gasket. Funny all I changed was the carb and the timing is still 10 degrees advanced just like I left it. I am sure changing the carb did not affect the timing.
I am sure with all that was done to this engine the timing marks are not as important as the timing itself. I always adjusted the timing a little advanced based on vacuum and ping. Get max vacuum and back of until it does not ping at high rpm. I think I read that on this site somewhere.
Rich
