ram air hood
 

I took a road trip and picked up 2 hoods one a 70 and other a 71 ra hood. They have been store for 25 plus years and the ra hood has what looks to be factory screens and boot retainers. I was told it was on a 70 or 71.

more pics
 

please give me insite on this hood anyone.

the 70 hood
 

I plan on having corners repaired and opening snorkle vents. it has 2 chipped corner but vents all in tacked. what you guys think?

I wouldn't open the scoops unless that is the one you plan to use.
Highest potential buyer might need closed scoops for their car.
You never know

thanks I didn't think of that. I was thinking of using it maybe.

Scoops have a lip inside opening, originals..

lios
 

Did over the counter dealer hoods and warranty hoods have lips around snorkel opening too or just factory? The screens and boot retaining rings look original . Im.thinking since they early design broke and if dealer had them in stock or at a dealer warehouse they would probably be closed snorkle vent since the probability of a standard formula breaking a hood under warranty was greater or if someone wanted to buy a hood that needed open snorkle they would cut on sight? It's just an idea. Do.you have pics of a dealer or over the counter ra hood?

Original hoods with or without fresh air, had a block off plate. The EDGE of this plate around the circumference is the "lip" . When the hood was opened up, this lip stayed.

my hood
 

I see mine has a wavy lip not as clean cut well I'm not going to stress on it. It has original hardware maybe done at duealer under warranty or at home
. I don't know.i can make the 70 with that lip that's easy with a osolatimg tool,Dremel or a small hand saw. Looks like a 1/8 or 3/16 lip. It restricts a little air flow thou.
Thank you. I think hood is a 71 since ram air sticker different too than 70 I noticed.

70 & 71 hoods are the same;
I would advocate you use the “71” opened hood, and save the closed hood as-is.

All the 70-75 hoods could be cut open and made functional;
Most 70-74, and all 75 Formulas were built with the hood left as non functional - so that would mean the closed hood has the most value being left closed.

Except for the brace on the hinge area of the hood.


:)

unless my memory is failing me, the brace was something that showed up during the 1972 model run - but maybe it was before the 1972 model run?

I cannot immediately recall when they started showing up, but generally speaking I have observed (and recall) that for 1973+ all had the brace, for 1970 none had the brace, and I had thought that it was safe to assume that all but a few 1971's didn't have the brace either.

I am confident I will be corrected if my memory is failing me.

amendment to my earlier post;

I took 'nacho's quote about the brown hood being a 1971 at face value;
I did not see (I was looking on my phone at the time) the presence of the braces.

I can now see (probably in part because I am now looking for it) that the second image shows the bracing;
With that being said, has anyone just drilled the rivets, removed the bracing, and epoxied over the bracing rivet holes?

I will add this;
from the "1970 one year only parts" thread:
I am not quoting myself to seem egotistical, but rather, if I have this wrong, I need to correct it.
I have tried to help with that ongoing thread in the hopes of better compiling all the unique features of 1970 (and to a lesser degree the 70-72) cars for the community;
If I have added something in error, I need to be corrected.

Formula hood history
 

I was told that the original 1970 formula 400 had issues and cars started showing back up at dealer mid 70 with damaged or broken hoods. That's why irs a 1 year only hood. The manufacturer of the hood had problems thus they redesigned the hood making is stronger and that was standard on all 71 to 75 formula hoods. My car is a real formula and once the 70 hood is repaired I probably will open vents with a lip. Im.not concerned about selling it or value of it not too excited about selling the hood but using it.

Formula hood history
 

I was told that the original 1970 formula 400 had issues and cars started showing back up at dealer mid 70 with damaged or broken hoods. That's why its a 1 year only hood. The manufacturer of the hood had problems thus they redesigned the hood making is stronger and that was standard on all 71 to 75 formula hoods. My car is a real formula and once the 70 hood is repaired I probably will open vents with a lip. Im.not concerned about selling it or value of it not too excited about selling the hood but using it.

Here's the problem:

There is a LOT of bad information out there - especially on social media sites;
You can find a myriad of people stating something as fact that they have simply made up, or that is based on part truth.

This is the merit of a community like this;
You can still have people say untruths, but because of the searchability (ect) of a forum, untruths can be contradicted, and the facts can be better backed up.
Social media site posts get buried, and are often hard to find after the fact - You can be in a conversation with a probably well meaning individual one day where he gives you some convincing information, but that discussion pretty much disappears - so if someone with more intimate knowledge of the situation could interject, they probably won't becausue they won't see the discussion.

I have seen so much bs passed off as fact on social media sites/groups... it's almost staggering.

But to get back to your post;
I have NEVER ever heard of 70 Formulas showing up at the dealer with "damaged or broken hoods" - EVER.

What I have read time and again is that once the 1970 Formula was put into production, there started being complaints about the hoods tendency to bow in the middle, and that the bracing was added by the 1972(?) model year as a means of combatting the fiberglass hoods tendency to bow.

I do not believe there was ever a service bulletin, or service repair issued. (If there is one, I am sure it will get shared)

You can see this bowing on most Formulas.

I believe the only real "fix" that has been found to work is to simply release the hood when parked in your garage;
You can let the hood rest on the catch, but don't let it latch;
If my memory serves me, the bowing is a result of the hood hinge's tension - (wanting to open the hood) combined with the resistance from the latch, and is an undesireable result from the fiberglass construction.

I should also add, that this was sold to me as a 1971 hood.

https://forums.maxperformanceinc.com...1&d=1709744337

hood confusion
 

wait the non bracing isn't a 1 year only hood?hmm is it possible that your hood is left over from 70? Why is everyone saying non braced hood is 1 year only. Now I'm really confused. learned about lips now this. wow

who is everyone?

You posted once that it was it was a one year hood, and I believe that John echoed this in mistake;
My recollection is that any and all prior discussion in the past about these hoods has suggested that it is a 70/71 part - with the braced hood being for sure installed on all 1973 cars.

I am ok with being wrong;
prove me wrong.

Another thought;
A 71-455HO Formula that i found ages ago, and my cousin bought, was all original - rusty but original;
As I recall, it too had an unbraced hood.

70 71 hood
 

Im.not arguing but learning. if change over was in 73 then ok. I thank you for teaching me this.