[tom s]

Keith has made some comments about the car on the Yenko site.Tom

[turbo69bird]

NHRA allowed the grand am to have a SD455

[turbo69bird]

NHRA allows the '73 SD455 engine to be used in Lemans, Grand Am, & Grand Prix models.

Some people(stock class racers ) say phil szupka had a GP w an SD455 from
The factory. Just here-say though.

[turbo69bird]

Originally Posted by Badbird69

Okay, here's my one-off story.
Back in December of 1968, a good friend of mine bought a '66 Dodge Coronet 4-door Hemi 4-speed off a dealer's used car lot. Yep, it was the real deal with all the good stuff: The 18-spline Hemi 4-speed transmission, the Dana rearend, the heavy duty suspension and brakes and even came with Goodyear blue line tires. It was probably the greatest street racer ever produced.
I bought it from him in 1971 and continued it's street racing legacy until I missed second gear once too often and broke the skirt out of a piston. I got married in 1974 and parted the car out out buy our first house. (Just shoot me)
I later found it and bought it back in 1981. It is now in the hands of another friend who is a Huge Mopar collector and is on a first name basis with Mopar numbers guru Galen Govier.
They have determined that Chrysler built four or five '66 Dodge Coronet Hemi 4-door cars with automatics. (Don Garlits has a white one in his museum). However, they only built ONE 4-door 4-speed car!!

If I knew then what I know now................

And yes, I still have a copy of the VIN and a copy of the build sheet from under the back seat.

In the really rare stuff department. Bristol CT was always a hotbed. Don’t know why. But my dad bought a 56 d500-1 convertible this is a car arnie beswick called his favorite race car ever . But this was convertible.
Later one of my dads freinds Bob Gaudreau raced Stephen Pontiacs 64 GTO race car, he then went on to race Paul dodge Pontiacs GTO race cars, then onto hemi cudas. Of course stephen pontiac raced a RAII GTO in 68 RAIV bird in 69, and RAV cars from late 70 to 73 w bill Eckstrom and Tom Mc innis driving them. I remember when people used to say steohens didn’t have an aluminum block and they never exsisted of course we all know several have popped up since the. There was some really rare stuff around bristol back In those days.

Let me add that bobs dad was some sort of executive w GM or a GM supplier.

[turbo69bird]

From a post on class racer website .


Mick Leifermans' 1971 GTO with a 455 HO was super competitive , he sold it to Alton Minchey . Mick then ran a 1973 GTO with a 455 Super Duty . These cars were run in the days when you had to have the factory lift , duration , and overlap , he was tight with General Kinetics developing a lot of "square nosed" stocker cams .


Seems like a lot of guys ran 73s w SD455 and it’s certainly interesting that NHRA which is pretty strict about combos that didn’t come in bodies (think RAV )would allow that in stock classes.

[R 70 Judge]

Originally Posted by turbo69bird

I’m not making ANY claims but let’s just say this is a pretty old picture .

Oh wow! So there’s a chance. Pretty cool. Thanks for sharing!

[sdbob]

I have a 73 cast iron SD intake that John Herslow ran. Rules said you can remove emissions. The bottom of intake has been cut removing extra cast iron. I oftened wondered why NHRA allowed certain cars in stock that were advertised produced but 'never' certified.

[Tom Vaught]

Not pure Drag Racing but I am aware of a couple of 73 Pontiac "Wagons" that had 73 SD engines installed in them on the line by co-workers there.

First Initial of the workers names were "M". They did a lot of racing on the "Far Out" Woodward road (as members of the "Mile per Hour" Club. Keith Seymore
probably knows the two brothers I am referring to.

Tom V.

[turbo69bird]

Originally Posted by sdbob

I have a 73 cast iron SD intake that John Herslow ran. Rules said you can remove emissions. The bottom of intake has been cut removing extra cast iron. I oftened wondered why NHRA allowed certain cars in stock that were advertised produced but 'never' certified.

What’s weird about it is the RAV was advertised as well but not allowed to run in stock or SS so why were others that weren’t made allowed to run. Doesn’t make sense . Gotta be a reason

[alain]

Hi everybody I am the new guy here
My question is does any one person or company reproduce the Ram Air system for 1973 1974 GTO or Grand Am.
Thank you for the help
Alain

[steve25]

The 74 GTO was Based on the Chevy Nova body and as such had Trans Am hood scoop .
I don’t think that’s the kind of scoop your thinking about.

[Stuart]

Originally Posted by alain

Hi everybody I am the new guy here
My question is does any one person or company reproduce the Ram Air system for 1973 1974 GTO or Grand Am.
Thank you for the help
Alain

If you mean the NACA scoop setup, there's been plenty of discussion about it but I don't think anyone has actually done a reproduction yet -if you use the Search function on the toolbar at the top of the page and search on NACA you should be able to find more information. With the proliferation of 3D printers these days it's probably more doable than it was in the past.