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Hello,Customer Did you install the gears dot to dot? Also, If the gears were installed dot to dot, I believe that position is #6 not #1, so maybe the dist. is off by a little bit. Just a thought.
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The early 80's v engines wher good for eating cam lobes.Can you get it to sound like popcorn when you nail the gas pedal in park?That also has teh first year scan data capibility to see parametrs so you can see if its lean.A pluged convertor and late ignition timing run about the same.You really need to get a voltmeter or scanner on it to see the O2 voltage to know if your rich or lean.
Did you change the crank?
Do did not degree it in and I wonder if the tdc marks are different.Pull #1 plug and rotate by hand the crank with a coat hanger in the cylinder as a gauge and get the piston up to tdc and see what the marks on the balancer show-after that your going to have to dgree the cam to make sure the cam is in time.A chain off 2 teeth will run like a stuffed convertor.
Beside the obvios valves-valve adjust-intake gasket-carb and ignition timing(you did disconnect the set timing connector?) your left with valve timing off of the timing chain
I think you should perform a compression test if you haven't done one and recheck where you stand. Maybe the crank had too much lift and maybe a valve got kissed by a piston. At this point anything is possible.