CLASS RACER FORUM - View Single Post

Lyn Smith · 01-18-2019, 02:54 PM

According to some vintage GM Parts Books I have, the flat top replacement GM pistons were discontinued in mid 1957,and replaced by the 56 57 piston with the reliefs.

01-18-2019, 02:54 PM	#5
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,121 Likes: 217 Liked 841 Times in 156 Posts	Re: Jr Stock piston rules According to some vintage GM Parts Books I have, the flat top replacement GM pistons were discontinued in mid 1957,and replaced by the 56 57 piston with the reliefs.