well i solved the problem
the outer van tie rod is the same a C10 of the same year
they make an adapter tie rod sleeve that uses the original 68' c10 outer tie rod
as my inner and uses 73-87 C10 stock type outer
here is a stolen photo:
the part is available from
performanceonline.com part #HPAS6570
http://www.performanceonline.com/196...-SLEEVES-PAIR/