will post pics tomorrow,dates on the heads are 4a8 4a10,the engine is c5ea-a with a casting date 5a27 i think.there is a stamped on a little side pad 3 or 4 # will post tomorrow,has adjustable rockers if that means anything.where the
oil filter bolts on there one hole straight in that 3/8 and one that at an angle that is about 1/2".