There is NO T/A cast into the head...they are J heads with pushrods drill offset with 360 cast into them.. They are the same casting number as the basic J head....so alot of people say they have TA heads because of the casting number until you show them a TA head with the offset pushrod location and the fact they only take the TA rocker arms....the 273 and stock non adjustable rockers will not work on the TA head.....
