L98 heads, which ones ?
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Joined: May 2002
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From: El Paso, Texas
Car: 1987 IROC Z
Engine: 350 TPI L98 block
Transmission: 700R4
L98 heads, which ones ?
It is my understanding that L98 heads had different bolt patterns through certain years. What years would be compatible with my 87 IROC 350 L98 ?
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From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
What are you talking about by "bolt pattern"?
If you are referring to the center bolts for the valve covers, then (as above) I think that '87 and above had center bolt valve covers. I have an '87 L98, they are center bolt valve covers.
If you are referring to the center bolts for the valve covers, then (as above) I think that '87 and above had center bolt valve covers. I have an '87 L98, they are center bolt valve covers.
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From: Tucson, AZ
Car: 1991 Z-28
Engine: Can you say stroke?!?!
Transmission: 700-r4
Axle/Gears: 3.42
No, the bolt pattern he is probably talking about is on the heads where it meets the intake. The 2 center bolts were at different angles than the outer bolts. I wanna say it was between 87-89 that it changed but I'm not sure. Someone will know the exact date for sure.
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From: Lower Salford, PA
Car: 1987 Camaro Z-28
Engine: 6.3L Victor EFI
Transmission: Tremec TKO 600
Axle/Gears: Moser 9"/4.11 Trac-Lok
Originally posted by five7kid
1987 model year.
1987 model year.
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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 Ricktpi
Unless you are talking a Corvette L98 (aluminum heads), they all had the old style bolt angle.
Unless you are talking a Corvette L98 (aluminum heads), they all had the old style bolt angle.
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