I also read in the Ramchargers book that they said they were making close to 500 hp with the Max Wedge eng in late 63 and when the Hemi first came out in 64 it was making well over 500 hp but at first was no faster on the dragstrip then the Max Wedge cars. They changed the cams in the Hemi's then and then they started running faster then the Max Wedge cars by mid 64 and the Hemi was pushing over 550 hp. Ron