1973 Grand Am 455 Super Duty
 

Thank you, very interesting read,
always saddens me that while pontiac folks have access to
so much great info, the same corporation has made info for other makes
unoptainable.

Sd-455...
 

Great article and story...

Interesting time at the end of the muscle-car era....big motors still available [minus the compression]...net HP ratings...crash bumpers and catalytics on the way.

Thanks for sharing..

-wilma

What a great story,…amazing

Wow - thanks for sharing

When you think you've seen it all....you haven't. Wild.

Amazing how finding that engine came together. Hopefully the body will surface. You just never know.

----I ordered a 73 SD Grand Am new. I was told by the dealer (Pontiac and Buick) in Medina Ohio that it was available. Dark blue with blue int 4-speed. I waited and waited. The dealer told me to be patient, but I think I learned from one of the salesmen that I would never get it. Why I ordered a new Riviera Gran Sport is still mystery to me. Kept it for about 6 months and traded it on a left over 72 Trans Am at Knafel Pontiac that had been Bill K's wifes driver. Way happier with that!.....Bill S

This actual engine was just shipped to Australia and is destined to go into the prototype SD455 Trans Am magazine test car. It was found down under ten years ago by a guy who just happened to find a used 73 T/A and wanted to restore it. When he got the PHS he freaked out (justifiably).

http://forums.maxperformanceinc.com/...710829&page=11

I wonder if this is how there were a couple of "Developmental" 1971 LS-6 Chevelle SS's....