[greg fulk]

Dave yes they do @ one time the 307 chevy had a .002 deck hight for all year but 71 in witch it had a .020 deck hight? it's now .002 like all the rest. mine & Billys car also had the wrong intake for years that's now fixed too. oh & everytime a new piston is approved for a 283 I have to email & get it approved for the 230 also as they use the same piston!