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fpcopo · 11-28-2018, 07:48 PM

Sorry, forgot to mention they used a cutter to open up the chamber next to the intake valve. It added about 1cc to the chamber. I’m not sure if they also did this on the 415 hp heads. The 320 degree cam might have been another change on the 425 cars. There is a good article on this in the August or September ‘63 Hot Rod magazine.

11-28-2018, 07:48 PM	#11
fpcopo Junior Member Join Date: Jun 2012 Posts: 12 Likes: 1 Liked 1 Time in 1 Post	Re: Max Wedge engine decals Sorry, forgot to mention they used a cutter to open up the chamber next to the intake valve. It added about 1cc to the chamber. I’m not sure if they also did this on the 415 hp heads. The 320 degree cam might have been another change on the 425 cars. There is a good article on this in the August or September ‘63 Hot Rod magazine.