84 bird carb'd 2.8 to carb 305
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Junior Member
Joined: Nov 2005
Posts: 7
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From: Chilliwack Bc Canada
Car: 1986 Fiero Gt
Engine: 3.1
Transmission: 3spd / shift kit
84 bird carb'd 2.8 to carb 305
Hey Sorry If This Has Been Covered ..
Its A 1984 Firebird With A 700r4 Auto 4 spd ..Has The Stock 2.8 Carb
Looking To Pop A 305 In ..Car Has T-tops As Well ..305 Should Be Ok With Out Beefing Up The Frame Correct ?
What Would I Be Lookin At As For Needed Parts ..And Things To look Out For
So For All The
Questions 
Its A 1984 Firebird With A 700r4 Auto 4 spd ..Has The Stock 2.8 Carb
Looking To Pop A 305 In ..Car Has T-tops As Well ..305 Should Be Ok With Out Beefing Up The Frame Correct ?
What Would I Be Lookin At As For Needed Parts ..And Things To look Out For
So For All The
Questions 
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Check out the V6 to V8 sticky at the top of this forum.
I consider subframe connectors a must-do modification on any 3rd gen, including those with V6's.
I consider subframe connectors a must-do modification on any 3rd gen, including those with V6's.
Thread Starter
Junior Member
Joined: Nov 2005
Posts: 7
Likes: 0
From: Chilliwack Bc Canada
Car: 1986 Fiero Gt
Engine: 3.1
Transmission: 3spd / shift kit
Ok I Looked Though It ..Im jsut Wondering If There Are Any Recommend Cars To Pull From ..Like Year Etc ? For The Lest StressFull Swap !!! lol
Member
Joined: Sep 2003
Posts: 243
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From: Los Angeles
Car: 1984 Trans Am
Engine: 2002 LS1
Transmission: 6 speed
Axle/Gears: 3:73
why do you want a 305? 350's make more power, and they have the potential to make a lot more power. The 45 extra cubes shouldn't be much of an issue with gas, if any noticable amount...
If you're set on a 305 I'd try to get an "L69" version. this was the high output version of the 305. it was available in Trans Ams and camaros. It is rated around 190hp versus the standard 305 (the LG4) which is rated around 140hp.
If you are grabbing one from an 84 pontiac f-body- the 8th letter in the vin will either be a "g" (L69) or "h" (lg4). I'm not sure on the other years or makes and models vin's.
I hope this helps.
Thanks,
-BV
If you're set on a 305 I'd try to get an "L69" version. this was the high output version of the 305. it was available in Trans Ams and camaros. It is rated around 190hp versus the standard 305 (the LG4) which is rated around 140hp.
If you are grabbing one from an 84 pontiac f-body- the 8th letter in the vin will either be a "g" (L69) or "h" (lg4). I'm not sure on the other years or makes and models vin's.
I hope this helps.
Thanks,
-BV
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The VIN engine code doesn't change with year or model. "G" will always be a L69.
It'll be easiest if the donor car is a Firebird, since the V6 tach is calibrated differently than the V8 tach. But, other differences (such as digital instruments) would make more difference than Camaro or Firebird.
350's became available in the 1987 model year, VIN code "8". Most any year would be okay, but the late 80's on with VATS makes life a little more complicated.
It'll be easiest if the donor car is a Firebird, since the V6 tach is calibrated differently than the V8 tach. But, other differences (such as digital instruments) would make more difference than Camaro or Firebird.
350's became available in the 1987 model year, VIN code "8". Most any year would be okay, but the late 80's on with VATS makes life a little more complicated.
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