+Would anyone know what size valves came in a 85 305 TPI with out having to open her up

 

If it has teh '416 head castings, the valves should be 1.84/1.50". Just remove a rocker cover and check the casting number. Heads should be an average of 54cc chambers as well, although the '416s I've toyed with seem to have slightly smaller chambers, cc-ing at about 53cc.