BTW 70-74 can be used and do interchange this will help in your search. Correct original 70 ones (left side) in good used condition are becoming very hard to come by and i have sold my set for quite a bit more through another venue (after i never heard back from you) than what i offered them to you here at a member discount for so your best bet is to buy repos. Classic Industries is a sponsor of this site and does repo them, their ad is on the right side of this page. Hope this info helps