wow i just took my heads off today..and holy ****..my 165,000 motor was freakin rebuilt i think..the piston walls look like they were honed..and no wonder my compression was a perfect 155 for all cylinders...jesus..now who knows what was done to this thing..is there any tips or ways that i can KNOW what things are stock..and what arnt..like my heads..how can i tell if they were ported or redone?? springs, etc...they had FELPRO gaskets on em..obviously they were off the block before...man oh man...i have no clue how to tell if they were done or not..and also..things like ROckers, pushrods, and lifters..how do i tell if THEY are stock??!!!!! i wanted to get 1.7 rockers for my new thumper heads..but how do i know they are not already on these heads here?!!! someone help me...im lost lol