Converting 2 bolt main to 4 bolt
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Junior Member
Joined: Jun 2002
Posts: 30
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From: London, ON
Converting 2 bolt main to 4 bolt
Is it possible to convert a 2 bolt main 350 SB to a 4 bolt main? Somebody told me the saddles where to thin on the 2 bolt 350 to add the second set of bolt holes in the block to mke it a 4 bolt, is that true?
Supreme Member
Joined: Mar 2002
Posts: 1,654
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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
Re: Converting 2 bolt main to 4 bolt
Originally posted by Dragon
Is it possible to convert a 2 bolt main 350 SB to a 4 bolt main? Somebody told me the saddles where to thin on the 2 bolt 350 to add the second set of bolt holes in the block to mke it a 4 bolt, is that true?
Is it possible to convert a 2 bolt main 350 SB to a 4 bolt main? Somebody told me the saddles where to thin on the 2 bolt 350 to add the second set of bolt holes in the block to mke it a 4 bolt, is that true?
Last edited by Ricktpi; Jun 14, 2002 at 10:25 AM.
Joined: Mar 2000
Posts: 43,187
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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
Re: Converting 2 bolt main to 4 bolt
Originally posted by Dragon
Somebody told me the saddles where to thin on the 2 bolt 350 to add the second set of bolt holes in the block to mke it a 4 bolt, is that true?
Somebody told me the saddles where to thin on the 2 bolt 350 to add the second set of bolt holes in the block to mke it a 4 bolt, is that true?
The castings are the same whether 2- or 4-bolt. So, the saddle is actually weaker on a factory 4-bolt block than on a 2-bolt. The splayed caps are the correct way to do a 4-bolt, which can only be done to a block that was delivered from the factory as a 2-bolt.
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