i E f y I r Fig 6A 1 Engin actu ed by push rods through stamped rocker arms simil r to conventional Chevrolet V 8 engines Steel alloy valve seat inserts are provided for durability Sta al tubes are used to house the push rods in the open area between the crankcase and cylinder heads adja c nt to the cylinders fig 6A 1 These tubes serve t 1 1 hhR I J 14 641