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formula447 · 12-15-2008, 09:35 AM

You don't need to change pistons,you need a cylinder head with a smaller combustion chamber.Get a pair of casting # 48s (used on 1969 350HOs 72cc) from ebay and you will have 10:1 compression.Pontiacs use flat top pistons.

Good Luck

12-15-2008, 09:35 AM	#2
formula447 Junior Member Join Date: Mar 2008 Posts: 6 Likes: 0 Liked 0 Times in 0 Posts	Re: Pontiac 350 Pistons You don't need to change pistons,you need a cylinder head with a smaller combustion chamber.Get a pair of casting # 48s (used on 1969 350HOs 72cc) from ebay and you will have 10:1 compression.Pontiacs use flat top pistons. Good Luck