Cm 870 cry for help

[Lonestar10]

different between a 4 and 6 degree wedge would be the timing the fuel gets shoved into the cylinder i cant remember how it goes but if the timing tables were set for a 4degree and you have a 6 it could be WAY advanced or WAY retarded. advanced is dangerous and will slowly in the sense of a year destroy the engine overheating the cylinders/oil/water. and if he says timing doesnt matter hes a fucking ass who needs a flogging.