Block size

Jun 13, 2002 | 08:11 PM

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Joined: Apr 2002

Posts: 901

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From: Pembroke Pines, FL

Car: 89 Firebird

Engine: 305

Transmission: T5

Block size

How do you guys tell the difference between a 350 and a 400 by looking at it?

Jun 13, 2002 | 09:29 PM

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Posts: 2,181

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From: Cherry Hill, NJ

Car: 92 Trans Am 'Vert

Engine: 305 TPI

Transmission: 5 Speed

Most 400's have 3 freeze plugs in a row on each side of the block. You can also just measure the bore:
350 = 4"
400 = 4.125"

Jun 14, 2002 | 02:03 PM

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Joined: Jun 2001

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From: Indianapolis IN

400 bores are siamezed (sp?) as well.

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