350 to 305?
11-02-2004, 12:17 AM
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Car: 88 GTA
Engine: 305
Transmission: Manual
350 to 305?
just an odd sort of question, can a 305 be dropped into a 350 car without major hassle? No, i'm not trying to be thrifty and get better fuel economy. I've got an 88 gta, with a 305 and I've been wanting to upgrade to a 350 and up here 350s go for about $1500 canadian.. well someone is selling an 89 gta with a 350 for 2700 bucks... so if u do the math 2700 - 1500 worth of engine = 1200 car... could i swap the engines and trannies that easily and then just resell the $2700 car with the 305 in it for the same price.. or would there be problems i'm not thinking of. cuz if my idea is fault free.. its like going up to a 350 for basically free 
Last edited by WhiteKnight; 11-02-2004 at 06:30 PM.
11-02-2004, 12:48 AM
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Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Depends upon what year the 350 is? I would not just blindly drop in a 350, because its a 350. There are many 350's that are way worse then your 305. Look for a 87 or later L98 it will drop right in. Also do a 
you will find all the info you ever wanted or needed and then some.
you will find all the info you ever wanted or needed and then some.
11-02-2004, 09:09 AM
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Car: 88 GTA
Engine: 305
Transmission: Manual
i know decently about dropping in 350s, but the main question was would a 305 drop into a car built with a 350... like would would the 305 mess with the computer or anything?
11-02-2004, 09:27 AM
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Car: 1991 Trans Am
Engine: built 305 carbed
Transmission: built 700R4
305s and 350s are pretty much the same block if u look at it, the only thing that changes is the stroke and the bore, so there shouldnt be any big time hassle
11-02-2004, 11:21 AM
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305s and 350s are pretty much the same block if u look at it, the only thing that changes is the stroke and the bore, so there shouldnt be any big time hassle
11-02-2004, 12:04 PM
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Originally posted by WhiteKnight
i know decently about dropping in 350s, but the main question was would a 305 drop into a car built with a 350... like would would the 305 mess with the computer or anything?
i know decently about dropping in 350s, but the main question was would a 305 drop into a car built with a 350... like would would the 305 mess with the computer or anything?
The only person I can imagine doing this is a fraudster who was going to sell his '350 car' with a cheap 305 engine transplanted in. Thus, keeping the 350 and conning the buyer.
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11-02-2004, 12:33 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I'm assuming the '88 is the one with the "sentimental value".
However, you try foisting a car that now has a 305 in it as if it still has the original 350, you aren't going to get any support from me (and perhaps will get something else from me instead).
However, you try foisting a car that now has a 305 in it as if it still has the original 350, you aren't going to get any support from me (and perhaps will get something else from me instead).
11-02-2004, 12:37 PM
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Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Oops sorry, i didn't get it replacing a 350 with a 305. I just thought you miss typed it, because it don't know why in the world somebody would do that.
11-02-2004, 06:29 PM
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Car: 88 GTA
Engine: 305
Transmission: Manual
the one that has the 305 right now i just got repainted which cost like 3grand and yes, its my first car, so sentimental value, but i want to get a 350 instead...
i want to swap the engines, 350 into mine, 305 into the other car... then resell the other car, it wouldnt be fraudulent to sell it with the 305, unless i'm still claiming its a 350, which I obvisouly wouldnt do. I'm not gonna go rip someone off.
The guy is sellin it for 2700 bucks, as long as the body is still in good shape which im assuming it is... i havnt looked at it yet, people will still pay 4000-5000 even if its a 305.
Instead of going out and buying a 350 from a totalled car and paying like $1500 bucks. I'd be buying a car, swapping the engines, then reselling the car. It would be like a 350 for free.
i want to swap the engines, 350 into mine, 305 into the other car... then resell the other car, it wouldnt be fraudulent to sell it with the 305, unless i'm still claiming its a 350, which I obvisouly wouldnt do. I'm not gonna go rip someone off.
The guy is sellin it for 2700 bucks, as long as the body is still in good shape which im assuming it is... i havnt looked at it yet, people will still pay 4000-5000 even if its a 305.
Instead of going out and buying a 350 from a totalled car and paying like $1500 bucks. I'd be buying a car, swapping the engines, then reselling the car. It would be like a 350 for free.
Last edited by WhiteKnight; 11-02-2004 at 06:35 PM.
11-02-2004, 06:42 PM
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Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
I get it now, good plan 
I would just swap the 305 right in, and wouldn't worry about anything. It may not be optimum but it should be fine.
I would just swap the 305 right in, and wouldn't worry about anything. It may not be optimum but it should be fine.
11-02-2004, 07:17 PM
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Car: 88 GTA
Engine: 305
Transmission: Manual
i just read the classifieds ad, i think it was a 305 originally anyways cuz it has t-tops. all 350s were hardtops right? except for some in 87
11-02-2004, 07:39 PM
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Originally posted by WhiteKnight
i just read the classifieds ad, i think it was a 305 originally anyways cuz it has t-tops. all 350s were hardtops right? except for some in 87
i just read the classifieds ad, i think it was a 305 originally anyways cuz it has t-tops. all 350s were hardtops right? except for some in 87
11-02-2004, 08:43 PM
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Car: 88 GTA
Engine: 305
Transmission: Manual
from my understanding some 87s came with the 350 and then they realized that the combo of 350s and t-tops were twisting the car so they only put t-tops in 305 cars... thats what i've been told... anyone want to clarify for us?
11-02-2004, 11:01 PM
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Car: 1991 Trans Am
Engine: 305 TPI
Transmission: T-5
all i know is i had a friend with an 88 iroc with t tops and a 350 car was totally stock cept for his "custom" work wich was mostly duck tape and empty bud 12 packs.....
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