First tune up, Spark Plug Tube seals??

Yep, starting in '81 hyraulic lifters until the /6 was killed in '87 in trucks, ('84 in cars) but was used in industrial/Ag applications until '91. So Mopar didn't have to change the block the lifters are "top fed" meaning the lifters receive the oil thru a grooved cam bearing, up thru the head, thru the rocker shaft, thru the rockers and down hollow pushrods to the lifters. This means that any engine can use either solid or hydraulic lifters if the associated parts are used.


Chuck