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[MI] 91 Formula

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Old Feb 4, 2021 | 07:05 PM
  #1  
toomany's Avatar
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From: Auburn, MI
91 Formula

1991 Firebird Formula.

Originally a 305/auto car. Swap was done clean with the exception of the center console shift plate.

New 355, maybe 3000 miles on it. Vortec heads, SDPC TPI intake, Comp cam (have the specs, will update when I dig them out), matching springs, new timing set, Hooker headers/Y-pipe, Magnaflow cat back (no cats), EBL flash with cable and software to tune.

T5 shifts great, new clutch, Hurst shifter, new 3.73 gears, believe it's an Eaton limited slip in there, aluminum drive shaft.

New stainless brake lines, fuel tank, pump and sending unit, Vogtland (pretty sure, they are purple) lowering springs, new ball joints, steering linkage, wheel bearings, brakes.

Interior, seats good shape. Minor wear to driver's side, door panel cup holders not broken, aftermarket digital speedometer, dash pad great shape.

The bad. Fuel pump relay went out, have to crank until it builds oil pressure before it kicks on. Carpet behind the rear seats was cut and is no longer there. Not sure why, no hole cut for fuel pump access. Minor scuff on front end, small dent by tail light on rear. Aftermarket speedometer (nothing wrong with it, just not personally a fan,). Was originally a TBI car, the TPI swap was done with an 88 harness. Everything works as it should, there are a few loose wires though...stuff that was in the engine harness one year and later moved to the body harness. AC was removed before I got it, I sourced all the parts to put it back. Very minor surface rust on the bottom. Windshield has a crack. Antenna motor stopped. Windows work but are slow. Aftermarket steering wheel.

Car runs very strong and drives down the road great. I bought it as someone's failed project. Put the 355, TPI and gears in then drove if for the summer. Put it in storage for the winter and haven't gotten it out since. I bought a 91 Firebird convertible that I drive more than this one is the only reason it has sat.

Car is still in storage, once we get a break in the weather I will bring it home and address the fuel pump relay issue along with the windows.

Looking to get $4500, but am willing to negotiate a little bit. Not going to give it away as I had plans to LS swap it and have a complete parts car here ready for that to happen, just have a few other projects that will happen before and I don't like seeing it sit.

There are some extras that could be included if the deal was right. T56 (everything minus the conversion cross member), LS1 front brakes, NOS 145mph gauge cluster.

​​​​
Photos are not current. They are from November 2019 right before I put it in storage. Can/will get some fresh ones once it comes home. But it looks pretty much the same as it's been under cover in it's own unit.










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Old Feb 4, 2021 | 08:46 PM
  #2  
Thirdgen89GTA's Avatar
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: 91 Formula

Tagging thread for a friend.

@RockinGTA89
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Old Feb 9, 2021 | 07:32 AM
  #3  
CKone's Avatar
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From: East Moline, IL
Car: 88 T/A, 91 Formula, 94 Firehawk
Engine: 400 Pontiac, 5.0 TPI, 5.7 LT1
Transmission: 700R4, T5, T56
Axle/Gears: 4.10, 3.42, 3.42
Re: 91 Formula

How much for just that driver side cup holder? 😂 don’t see them too often, you could probably bump the price because they are both there! Lol. Looks like a nice car, glws
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Old Feb 9, 2021 | 07:39 PM
  #4  
toomany's Avatar
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From: Auburn, MI
Re: 91 Formula

Originally Posted by CKone
How much for just that driver side cup holder? 😂 don’t see them too often, you could probably bump the price because they are both there! Lol. Looks like a nice car, glws

They are both still there and intact! Lol
My other 91 has both in perfect condition too. I get why they break, but I've never had a problem with them.
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Old Feb 11, 2021 | 10:37 AM
  #5  
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: 91 Formula

Very cool car wish it were closer id buy it and drive it every day! GLWS, someone will buy it soon should be a very fun car.
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Old Mar 6, 2021 | 05:44 PM
  #6  
toomany's Avatar
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From: Auburn, MI
Re: 91 Formula

Price drop bump. $4300obo. Found something else I'm interested in, so this is a little more motivated to move.

Brought it home did a few things then needed garage space back so it's back in the storage unit.

Didnt mention it in the first post, but car also has new Southbay injectors and adjustable fuel pressure regulator.

Floors aren't horrible, but will eventually need work. I have some undercarriage pictures on my phone.

Map pocket came unglued, cable hanging down from it is for the EBL.






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Old Mar 8, 2021 | 02:11 PM
  #7  
ktthecarguy's Avatar
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Posts: 411
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From: Livonia MI
Car: 88 Camaro vert/86 SC
Engine: 355 tbi/2.8 V6
Transmission: 700R4/T5
Axle/Gears: 2.72 posi/3.42 open
Re: 91 Formula

PM sent
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Old Mar 10, 2021 | 05:52 AM
  #8  
toomany's Avatar
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From: Auburn, MI
Re: 91 Formula

Sold-pending payment.
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