After finding a broken valve lock ,i went ahead and pulled the heads.I spent about 20-25 hours mildly porting them ,followed by a lot of blending ,gasket matching,and casting mark removal.They are at the machine shop now getting a fresh valve job .I also bought new Comp springs ,retainers ,and locks .I gasket matched the intake as well .Cant wait to see what happens with the new cam and head work ...