Super Duty 455
|There are a lot of Pontiacs powered by 455 engines around today. The 455 is the block of choice by many Pontiac enthusiasts because it is a proven platform for building power. With a small investment, a basic 455 can easily be built to deliver well over 450 horsepower at a very streetable rpm. The ultimate 455 blocks, the SD-455s from 1973 and 1974, are quite rare and cars so equipped are sought after by collectors. As a result, the SD-455 powered Trans Ams (or 1 of the 101 ultra-rare Formulas, and some other Pontiacs) are usually near the top of many collectors' wish list. The pictured Buccaneer Red 1973 Trans Am equipped with an SD-455 is owned by Larry Navarro.|
|LS2 engine option cost less than $600. 800 cfm Q-jet, 4 bolt mains, forged rods, TRW forged pistons, provision for dry-sump lubrication, a round port low compression head, dual exhaust and 290 net horsepower @ 4000 rpm.|
|Classic Trans Am interior without bells and whistles? Neat and simple!|
|Psst...Larry's TA has a working fresh air scoop for more power.|
Well heres the story about my 1973 SD-455 Trans Am.
From what Ive been able to gather, this car is possibly the only SD455 Trans Am known to have this option. I called ASC in Detroit to verify if in fact they had any records of cars dating back that far. Of course I had received the run-around, calling different offices across the country before finally talking to a man located at an ASC office in California. He confirmed that he was in Detroit in 1973, back when the roof conversions were being performed; and told me that a majority of the cars that received sunroofs were the large luxury cars. "A few Grand Prixs, and maybe some Firebirds, but rarely if any Trans Am cars", he said.