I have 2 problems. One is about black soot coming out of the exhaust pipe expecially when starting. It runs pretty good but if you hold up cardboard it gets black soot all over it. I have a 1961 235 in my 1952 truck. I have a new fuel pump, new GM Rochester carb from Chevy Duty, new intake and exhaust gaskets,new points and condiser. I have adjusted the only screw on the carb every which way but loose. I have set the timing I think, I can't tell for sure. I can't find the ball that is supposed to be on the flywheel but I found a hole that may be threaded where the ball may have been. Like I said it runs pretty good but not quick good enough. Maybe I need to adjust the valves? What would cause the black soot in the exhaust and the plugs? Also I have an exhaust leak that sure appears to be around the heat riser. It is turning it black also. I listened for it with a piece of hose and that is the only place I can hear a leak, it sure sounds like that is where it is coming from and with the soot there I suspect I am right. What do I do for this? I also put a new heat riser spring on it but it acts strange, is it supposed to bounce around when it idles? I had the manifold off when I put it on and test it with my torch and it appeard to work fine. Sorry this is so long but I am so close to cruising and want it to run great. Like I said it runs pretty good but am worried about the black soot and the exhaust leaks sounds like crap. :mad: Any help would be greatly appreciated.
Thanks
