Hi there thanks for the add. well my 460 will run when in park. with really light pops out of the carb and will slightly miss.when in drive it runs bad and trying to die it will not idle the dash shakes while in gear that bad.until its up to temperature.then it pop in and out on all 8 cylinder's doing the same thing i have the timing on point with out wires crossing rotor on number one tdc with number 1 cylinder up.new list fuel filter an pump wires plus ignition box on driver side wheel well holly 600 floats on point air mixter also 2 out on passenger side 1 1/2 on the driver side all 8. plugs look the same when pulling them out gabs at 45 tested every plug wire on a different rig. and they check out good.iv put tranny fluid in all cylinders for most compression to see if i have a dead hole no change it ran the same. So im thinking bad cam or valves ?.i cant cover one pipe at the back of the truck but the other is pushing in an out from the driver side bank not all the time

 

Hi there thanks for the add. well my 460 will run when in park. with really light pops out of the carb and will slightly miss.when in drive it runs bad and trying to die it will not idle the dash shakes while in gear that bad.until its up to temperature.then it pops a in and out on all 8 cylinder's doing the same thing i have the timing on point with out wires crossing rotor on number one tdc with number 1 piston up.new list fuel filter an pump wires plus ignition box on driver side wheel well holly 600 floats on point air mixter also 2 out on passenger side 1 1/2 on the driver side all 8. plugs look the same when pulling them out gabs at 45 tested every plug wire on a different rig. and they check out good.iv put tranny fluid in all cylinders for most compression to see if i have a dead hole no change it ran the same. So im thinking bad cam or valves ?.i cant cover one pipe at the back of the truck but the other is pushing in an out from the driver side bank not all the time

 

You have the firing order wrong.

 

Bad timing,
Wrong firing order,
bad pick up signal from dist