Hi, I was wondering if anyone can help me i.d. my 2.6 engine, what year it is. I have 2 engine sthat have different heads 1 has adjustable rockers and the other doen't. the one with the adjustable rockers has l shaped rings and the other has regular rings. Can anyone please help I need to order parts and not sure what year it is. I thought all 2.6's from 81- 89 were the same,apparently not.Are the pistons from a 87 to a 82 engine still work? thanks for any and all help.