I just put a 65-289non-hipo block into my 69 mustang coupe. The head's from that motor had a valve job done along with gasket matched exaust port's. I used the cam from the motor b4 it is a edelbrock performer and the lifter's were wore down on the whole circular edge like it was beveled over or somthing on every lifter x-cpt 1...wierd huh? I didn't build the previous motor myself but I'm thinking maybee he over adjusted the valve's? But it ran good.....for awhile....2nd I have it running now but make's some light nocking and lifter noise more so in gear I know the carb has an air leak! If the air/fuel is wrong can it knock and ping? Plus the carb sat with gas 4 like a year. Is there any trick to find out if you have a rod knock or not??? PLEASE thnks