the noise is coming from the rocker boxes, it' sounds like lose lifter or unadjusted push rods in the top,i did put in new oil after running it for 10 min when i changed p,rs, to make sure no garbage in it, amsoil 20-50 motor trans and primary also, when idleing you can here it and when i speed it up at a little higher not sure of the r,s but you here it louder, right now i have the P,Rs set to where they are snug -lobes down if i go any tighter i wont be able to turn them after bleed down, ok what it has as far as the motor is as far as i know is s,e heads cams pistons 103cu, in,and it is louder from the front jug, right now i have the set at 3 turns and dont think i can go tighter ,i dont beleive there was much difference when i changed the adjust ment, thanks for any and all help guys