would these heads fit?????
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From: Woodstock, GA
Car: 1987 Trans Am
Re: would these heads fit?????
Originally posted by 86z28stroker
I am rebuildin my 86 z28 and i was wondering if heads from a malibu that had a 305 in it would fit. The motor in my car is a 305 v8. Also would 350 heads fit on it?
I am rebuildin my 86 z28 and i was wondering if heads from a malibu that had a 305 in it would fit. The motor in my car is a 305 v8. Also would 350 heads fit on it?
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Joined: Oct 2002
Posts: 9,067
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Yes, they will bolt on.
No, you don't want 350 heads on a 305. If you have a 350, then go nuts
The only difference between the '55-86 and '87+ SBC heads is this:
- A few of the intake bolts are drilled at a different angle on '87+. No big deal, just gotta get special washers to make them work with '55-86 intake.
- '87+ has centerbolt valve covers, '55-86 has 4 of them around the outside (*side note* '55-60 has two valve cover bolts in a slightly different spot than '61-86 heads)
No, you don't want 350 heads on a 305. If you have a 350, then go nuts
The only difference between the '55-86 and '87+ SBC heads is this:
- A few of the intake bolts are drilled at a different angle on '87+. No big deal, just gotta get special washers to make them work with '55-86 intake.
- '87+ has centerbolt valve covers, '55-86 has 4 of them around the outside (*side note* '55-60 has two valve cover bolts in a slightly different spot than '61-86 heads)
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Joined: May 2003
Posts: 422
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From: dallas,tx
Car: 1987 Trans Am
Engine: tree-fiddy
Transmission: 700r4
Originally posted by Air_Adam
Yes, they will bolt on.
No, you don't want 350 heads on a 305. If you have a 350, then go nuts
The only difference between the '55-86 and '87+ SBC heads is this:
- A few of the intake bolts are drilled at a different angle on '87+. No big deal, just gotta get special washers to make them work with '55-86 intake.
- '87+ has centerbolt valve covers, '55-86 has 4 of them around the outside (*side note* '55-60 has two valve cover bolts in a slightly different spot than '61-86 heads)
Yes, they will bolt on.
No, you don't want 350 heads on a 305. If you have a 350, then go nuts
The only difference between the '55-86 and '87+ SBC heads is this:
- A few of the intake bolts are drilled at a different angle on '87+. No big deal, just gotta get special washers to make them work with '55-86 intake.
- '87+ has centerbolt valve covers, '55-86 has 4 of them around the outside (*side note* '55-60 has two valve cover bolts in a slightly different spot than '61-86 heads)
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Joined: Jan 2002
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
TGO Supporter
Joined: Oct 2002
Posts: 9,067
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
I don't see a pic at that link, but that sounds like them. And yes, thats all you need.
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From: dallas,tx
Car: 1987 Trans Am
Engine: tree-fiddy
Transmission: 700r4
ok, it says they are for "Professional Products" manifolds and so, if he wanted to use say an edelbrock or holley intake those washers prob wont work, as I have seen exactly how far off the holes actually are. 
and no washer is going to make stock chevy intakes pre 87 fit post 87 heads.
and no washer is going to make stock chevy intakes pre 87 fit post 87 heads. TGO Supporter
Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Originally posted by Dr.NickRiviera
No washer is going to make stock chevy intakes pre 87 fit post 87 heads.
No washer is going to make stock chevy intakes pre 87 fit post 87 heads.
Member
Joined: May 2003
Posts: 422
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From: dallas,tx
Car: 1987 Trans Am
Engine: tree-fiddy
Transmission: 700r4
Originally posted by Air_Adam
Yes they will, I have seen them, they do exist and they do work.
Yes they will, I have seen them, they do exist and they do work.
Joined: Mar 2000
Posts: 43,187
Likes: 42
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
Elongate the holes in the intake manifold and put the washers under the bolt heads.
Joined: Mar 2000
Posts: 43,187
Likes: 42
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
Originally posted by Air_Adam
- '87+ has centerbolt valve covers, '55-86 has 4 of them around the outside (*side note* '55-60 has two valve cover bolts in a slightly different spot than '61-86 heads)
- '87+ has centerbolt valve covers, '55-86 has 4 of them around the outside (*side note* '55-60 has two valve cover bolts in a slightly different spot than '61-86 heads)
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Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Originally posted by five7kid
Mid-year 1959 change, if memory serves.
Mid-year 1959 change, if memory serves.
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