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Unless I am sadly mistaken, Pontiac built zero. The 455HO (round port heads) were never made again after the 1972 model year. In 1973 and 1974 the Hi-Po 455 was the Super Duty which was offered in the Formula, but is very rare as a factory build. The late 70's "HO" used d-port heads. I currently own a '72 Formula, and have bought and sold several '70 - '72 Firebirds, Formulas, and Trans Ams stating over 30 years ago.
What else can I help you with?
Will 1968 or 1969 firebird windshields fit a 1973 firebird?
No
Rear bumper on 1973 firebird?
Yes it has one
What are the release dates for Police Story - 1973 Firebird 3-18?
Police Story - 1973 Firebird 3-18 was released on: USA: 6 February 1976
What years firebird windshield will fit 1973 firebird?
I'm fairly sure that the 70-81 windshield is the same dimensions.
What was the horse power rating for a 1973 Firebird Esprit?
150 to 175 hp
Which is faster 1973 firebird or 1991 Mitsubishi eagle talon?
the bird dude
Which is faster stock 1973 firebird or 1991 eagle talon with turbo?
the firerbird if it has a v8
When were the twintowers built?
The twin towers were built in 1973.
What date was the Skylab built?
skylab was built in may,1973
What country was the person from that won the Formula One World Championship in 1973?
1973 Formula 1 champion: Jackie Stewart (Scotland)
When was the modern London bridge built?
1973
Why don't the dash lights and park lights work on a 1973 Firebird?
the 1973 f body fuses are separate for park lamps and dash lamps, so it must be in the light switch itself.
