ok i also have an exhaust system that went on my 84 chevy pickup it is true dual 2-1/4in. aluminized pipe, 2 chamber 40 series flowmasters dumped before the rearend for $80.   i also have a set of the short style chrome valve covers that has a k + n breather with a filler cap on one side and a pcv groment on the other,  $25