ok, got another engine question. the seal/o-ring that goes inbetween the rocker shaft, can it just be any o-ring that fits or should it be a specific one from toyota? its number 28 on the diagram. http://www.sor.com/sor/cat050.tam?xax=17811&page.ctx=cat050.tam
http://www.sor.com/sor/products2.tam?xax=15760&category.ctx=050-28&page#.ctx=050
http://www.sor.com/sor/products2.tam?xax=15760&category.ctx=050-28&page#.ctx=050