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My new 89 Formula 305 TBI T-Top

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Old Mar 31, 2025 | 10:12 AM
  #1  
89RedFormula's Avatar
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From: Rhode Island
Car: 1989 Pontiac Firebird Formula
Engine: 305 TBI (stock)
Transmission: T5 (Converted May 2025)
Axle/Gears: 2.73, non-posi drum
My new 89 Formula 305 TBI T-Top

Hey all!

I first joined here in 2017 and had an 88 Firebird Formula 305 TBI T-Top w/Auto. I always loved engaging with folks on here while I had it, but I sold it in 2021 when I had an opportunity to snag a local and fairly mint 5-speed 1990 Mustang convertible. After 4 years with the fox, I decided I missed the iconic edge of driving a T-Top car and so I sold the Mustang and picked up an 89 Formula with T-Tops last weekend and I'm stoked!

Her name is Scarlet, she's a 305 TBI 89 Formula with automatic and 92k miles. Interior is in awesome shape aside a baggy headliner and discolored sail panels. The drug-dealer tints on the car in the photos below has already been removed. The first project I'm tackling is a WC T5 swap, but the project list is slowly growing faster than my bank wants - hatch hinge replacement, replace hatch motor, replace spoiler, replace shocks/struts with dial-adjust KYB AGX, go with 3.23 gears to wake things up a bit, rear wing replacement, etc.

Wish I could change my username but I guess I'm stuck with what I have - ha! Pics below!













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Old Mar 31, 2025 | 10:54 AM
  #2  
Airwolfe's Avatar
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From: Franklin, KY near Beech Bend Raceway, Corvette Plant and Museum.
Car: 1992 Pontiac Firebird
Engine: 5.0L L03 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: My new 89 Formula 305 TBI T-Top

Nice looking 89 Formula you have there.
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Old Mar 31, 2025 | 11:10 AM
  #3  
89RedFormula's Avatar
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5 Year Member
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Joined: Jan 2017
Posts: 57
Likes: 13
From: Rhode Island
Car: 1989 Pontiac Firebird Formula
Engine: 305 TBI (stock)
Transmission: T5 (Converted May 2025)
Axle/Gears: 2.73, non-posi drum
Re: My new 89 Formula 305 TBI T-Top

Thanks! Pretty nice to have all the options it has (cruise, power windows and locks, trunk release). The AC even blows ice-cold.

My '88 was pretty bare bones but loved it just the same - this was my '88:
https://www.thirdgen.org/forums/fire...d-black-t.html

Last edited by 89RedFormula; Mar 31, 2025 at 11:15 AM.
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Old Mar 31, 2025 | 11:33 AM
  #4  
ksr's Avatar
ksr
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Joined: Aug 2018
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From: Hilton Head Island, SC
Car: 1988 Pontiac Trans Am GTA
Engine: 5.7 liter V-8
Transmission: 4 speed auto
Re: My new 89 Formula 305 TBI T-Top

Looks great! I have a GTA, but the Formula is still my favorite trim level. I had two in the past.
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Old Mar 31, 2025 | 09:37 PM
  #5  
DynoDave43's Avatar
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Joined: Aug 2013
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From: MICHIGAN
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: My new 89 Formula 305 TBI T-Top

She's a beauty! Congratulations.
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Old Mar 31, 2025 | 11:41 PM
  #6  
TTOP350's Avatar
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Joined: Oct 2001
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: My new 89 Formula 305 TBI T-Top

Looking good!
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Old Apr 1, 2025 | 12:04 AM
  #7  
chazman's Avatar
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Joined: Dec 2001
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: My new 89 Formula 305 TBI T-Top

Nice! Congrats!
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Old Apr 1, 2025 | 06:33 AM
  #8  
dmccain's Avatar
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Joined: Mar 2014
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: My new 89 Formula 305 TBI T-Top

Great looking car. Get rid of the 2.25 in exhaust and go back with all 3in, this will be one of the biggest upgrades you can do for it. Bumping the timing up to around 6* seemed to pick up my old L03 a lil also.
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Old Apr 1, 2025 | 09:44 PM
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Joined: Mar 2010
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From: South FL
Car: 1989 Formula T-Top
Engine: 350 TPI, twin turbo
Transmission: 700R4
Axle/Gears: 3.23
Re: My new 89 Formula 305 TBI T-Top

Nice! Also I think they can change your name, they did mine some time ago.
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