Stuart thank's I really thought i was losing it.I didn't thing chevy made a flat and i really didn't feel like having a debate it was late last night and i had to get up at 4 am for a 10hour work day.I tried searching the web for documentation to print out ,but nothing being specific that the motor's were overhead or flat head.Thank's again i can taste the dinner now,or i'll settle for a few cold one's.Chad