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Tim Jonsson · 01-02-2022, 11:57 PM

I'm trying to determine what the rules are pertaining to a 1967 Shelby 428 with dual fours and flattop pistons combo for SS.

new engine is using the Edelbrock heads, BBM block, Winberg crank, 55mm LSM cam, Manley rods, Gibtec pistons etc.

is there any difference in piston configuration required by NHRA from 67 to 70 for example,.

I was previously running the CJ 428 iron head combo in a 1970 Cougar in SS/HA

Thanks

01-02-2022, 11:57 PM	#1
Tim Jonsson Junior Member Join Date: Sep 2007 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	428 Shelby SS I'm trying to determine what the rules are pertaining to a 1967 Shelby 428 with dual fours and flattop pistons combo for SS. new engine is using the Edelbrock heads, BBM block, Winberg crank, 55mm LSM cam, Manley rods, Gibtec pistons etc. is there any difference in piston configuration required by NHRA from 67 to 70 for example,. I was previously running the CJ 428 iron head combo in a 1970 Cougar in SS/HA Thanks Attached Thumbnails