Thoughts on accepted aftermarket heads for 350?

[Bob Mulry]

Originally Posted by Barry Polley

Hey BG!



Eliminate heads up? Need a really good explanation ...
Are we not a Performance based class?
Combine Auto and Stick? Stick will run away with it. You might think an auto is as fast but a good stick will kick your a $ $. If.... one does not have the negative paper factor in favor.
Have they decided to do away with the Alum Head penalty for all?
Appears the Gov irrigation flow gate is wide open.
Crate motor combos. No- period.

All you have to do is look at what the flakes from the IHRA are posting on line.....

They don't even look at wheel studs anymore....

With tech the way it is how far can no heads up be??????

The only thing that could be done is to protest the car, but on the other hand will the NHRA have their people in place to do the inspections????

If and when it happens I'll find something else to do after doing it for 55 years.......

[terry1]

So, is it a fact, that the advertised runner volumes on the replacement heads are
acceptable?
In my case, my 624's are to be 168 CC's in/on the intake.
So the aluminum 175 CC's would be accepted??
Terry K

[5389stk]

Back on topic 350 chevy heads , why would any racer go to all the trouble to approve iron head such as the dart 1070 . You would have to mill intake flange off or valve cover rail to get to 165 .

[5389stk]

Stock runner must be same size as head it is replacing. According to stock head cc guide sub notes on replacement heads

[Bobby Lundholm]

Originally Posted by 5389stk

Stock runner must be same size as head it is replacing. According to stock head cc guide sub notes on replacement heads

That's what the question is on how to get there without it being illegal.

[terry1]

I figured that that would be the case.
So, if I have a set of aluminum heads that are 168 CC's on the intake;
that says that NHAR does not care how it is done as long as it is
"stock in appearance"!
That says to me that NHRA are saying "go at it boys" and see how good
you are!
Terry K

[Bobby Lundholm]

Originally Posted by terry1

I figured that that would be the case.
So, if I have a set of aluminum heads that are 168 CC's on the intake;
that says that NHAR does not care how it is done as long as it is
"stock in appearance"!
That says to me that NHRA are saying "go at it boys" and see how good
you are!
Terry K

Right or run it as it is with the 185cc runners. Either way it's technically illegal.