400 Cid Sbc
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Joined: Jan 2000
Posts: 20,981
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
They'll bolt on but they should have steam holes drilled in them first. You might want to check what the compression ratio will be too.
Joined: Mar 2000
Posts: 43,187
Likes: 43
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
You don't have to use a flat tappet cam, but you can't use factory roller lifters. You may also need a small base circle cam.
Other issues include externally balanced harmonic damper and externally balanced flexplate (typically 168 tooth, which is 14", often causes starter issues requiring the use of a ministarter).
Going with the L98 heads is the right move. Factory 400 heads are boat anchors. Drill the steam holes using a 400 head gasket as the template.
Other issues include externally balanced harmonic damper and externally balanced flexplate (typically 168 tooth, which is 14", often causes starter issues requiring the use of a ministarter).
Going with the L98 heads is the right move. Factory 400 heads are boat anchors. Drill the steam holes using a 400 head gasket as the template.
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Joined: Aug 1999
Posts: 2,842
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From: Rowlett, TX
Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Originally posted by five7kid
Factory 400 heads are boat anchors.[/B]
Factory 400 heads are boat anchors.[/B]
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