How many 9 second 396/375 alum head A/S A/SA

[TOSTO RACING]

Originally Posted by Mike Carr

I believe Paul Mercure did it at Montgomery Alabama several years ago at the NHRA Div 2 Open. I believe the third or so 9 second Stocker ever.

If anyone could do it he would be the one for sure! I'll need a 50mph tailwind and -3000 ft da lol. I've never actually seen one in person do it. I've seen some 10.teens in bad air and I know they could if the air was right!

[Dave Noll]

This appears to be an older video.

[ame="http://www.youtube.com/watch?v=EyksWlC-HFo&mode=related&search="]http://www.youtube.com/watch?v=EyksWlC-HFo&mode=related&search=[/ame]

[t.tosto]

I sure couldn't, but you already knew that.

[Cdncarnut]

The Aluminum Head 396 was not available in '67, so it would not be legal.
The first year for this option was 1968.

[TOSTO RACING]

Originally Posted by Cdncarnut

The Aluminum Head 396 was not available in '67, so it would not be legal.
The first year for this option was 1968.

It is legal check the stock car classification class guide.

[Mike Fuller]

Joe Martens laid down a nine second pass in his 69 A/S car at Norwalk.

[Cdncarnut]

Originally Posted by TOSTO RACING

It is legal check the stock car classification class guide.

This is where things get a bit confusing for a newbie like me.

So, the NHRA allows someone to run an engine combination which was not available for that model year, yet I cannot run a cowl induction hood for the 350/255 combo because the engine option was cancelled before the cowl hood was released?

After checking the classification guide, I noticed that aluminum heads are also legal for the '69 iron block 427, even though that was never offered from the factory.

[Lee Valentine]

Thomas,it's not allways what was produced in the old days but what is accected by NHRA. Welcome to stock eliminator 2014,just have fun racing. I've been racing since 1962 and guys are bitching about the same things now as they did back in the day. You should have heard the crap when Ford brought out the original Cobra Jet in '68 you would have thought someone tried to kill Grompy Jenkins. This is from the eyes of a G.M. racer.

[Alan Roehrich]

Originally Posted by Cdncarnut

This is where things get a bit confusing for a newbie like me.

So, the NHRA allows someone to run an engine combination which was not available for that model year, yet I cannot run a cowl induction hood for the 350/255 combo because the engine option was cancelled before the cowl hood was released?

After checking the classification guide, I noticed that aluminum heads are also legal for the '69 iron block 427, even though that was never offered from the factory.

See my post above.

The GMPP 401 aluminum head is listed as an NHRA accepted replacement part for the early cast iron big block Chevy closed chamber rectangle port head. There is a HP penalty for using the aluminum replacement head. For example, we used them on a 69 Camaro 427/425, and that raised the HP rating from 425 to 435, so we had to add 80 pounds when running them in A/SA.

There are certain parts allowed by NHRA as replacements for old castings that are both difficult to find, and expensive to buy. In the case of cylinder heads, a HP penalty is applied, it usually starts at 10HP.

In the case of the 401 head, it is not allowing a different engine combination, it is allowing the 401 head to be used as a replacement for the OE head, with a HP penalty applied.

The same applies to some heads for other makes. An aluminum replacement head is allowed for certain combinations, and it carries a HP penalty.

[Alan Roehrich]

Originally Posted by Cdncarnut

The Aluminum Head 396 was not available in '67, so it would not be legal.
The first year for this option was 1968.

The GMPP 401 aluminum head is the replacement for the cast iron closed chamber rectangle port heads of that era. There is a HP penalty on the factor for them. They started out at 10HP above the original cast iron head several years ago. So, yes, they are legal, and found both in the classification guide and the blueprint guide.