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SD455, riginal/Unrestored Time Capsule Quality 1973 Trans Am SD455, ameo White Exterior, xblood Deluxe/Custom Vinyl Interior, nly 10K (Yes 10K ) Original Miles Since New, riginal Numbers Matching SD455 LS2 Engine, riginal Numbers Matching TH400 Automatic Transmission, oaded Up With Options Including Factory Air Conditioning, ower Windows, ilt Wheel, ront Console, ustom Trim Group, oft Ray (Tinted) Glass, lus Much More, ne Of Only 180 Super Duty Trans Am's Produced In 1973 With The TH400, riginal/Unrestored Muscle Cars Like This Are Highly Coveted By Collectors Where Originality Trumps Everything, hey're Original Only Once!!BackgroundWith the 1973 model year came lots of bad news in emissions regulation, afety standards and gas prices, ut to true the Pontiac aficionado these problems were all over-shadowed by a single tidbit of good news from PMD: 1973 was the year of the Super Duty.The 455SD was, rguably, he greatest Pontiac engine ever bolted together. The block has reinforced main bearing webs and 4-bolt mains. It used strong forged steel connecting rods that were held onto the heavy-duty nodular iron crank by 7/16-inch bolts. Pistons were TRW forged pieces, nd the oiling system used a 80-lb. Spring in the high-volume pump, crew-in oil plugs in the block and had a provision for a dry-sump pump. The distributor’s oil pump drive gear was oversized as well.The cam was 301/313 duration with .406-inch lift when installed with the SD’s 1.50 ratio rockers. The heads were big round port jobs that used the familiar 2.11/1.77-inch tulipped and swirl-polished valves that resided in 111cc chambers, ielding 8.4:1 compression. The intake, pecific to the engine was an iron unit with EGR provision, hich mounted an 800-cfm Rochester Quadrajet carburetor. Stream-lined iron headers, .5 inch head pipes, ual resonators and 2.25 inch tails enhanced exhaust flow. Car and Driver got 13.8 ET's out of an automatic-equipped Trans Am running a 3.42 gear back in 1973.Please Call For Details At 708-478-0500, r View Our Entire Inventory @ www.swcorvettes.com
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