I;m having a problem with my setup. my valve is knocking. it coming more from the dist.. side. i adjust the valve. check and redo the timing. i have ycp piston. a copy of eagle rod call star.. From tunertoys.com i have to notch the block for the rods. i ope the pan and check it again to see if its hitting. and its not. the knock is coming from the valve.. i changed 3 head that i had too. i try useing thinker oil and its the same. i needed in help .. anything got any idea.