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X-TECH MAN · 02-16-2018, 08:18 PM

[QUOTE=KEN BUGAJ;556369]Stock was diluted in the late 70's when they changed the can & valve spring rules. There's no more stock,. It's modified stock.[/QUOTE

Ken......Stock as we knew it died in 1985. That was when NHRA allowed any valve spring pressures and any duration and overlap specs.

02-16-2018, 08:18 PM	#7
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,203 Likes: 1,047 Liked 235 Times in 110 Posts	Re: Crate Motor Class [QUOTE=KEN BUGAJ;556369]Stock was diluted in the late 70's when they changed the can & valve spring rules. There's no more stock,. It's modified stock.[/QUOTE Ken......Stock as we knew it died in 1985. That was when NHRA allowed any valve spring pressures and any duration and overlap specs. Last edited by X-TECH MAN; 02-16-2018 at 08:25 PM.