Chevy Bellhousings

With what is arguably the most popular and consistent engine block bolt pattern of all time, the Chevy Small Block / LS Series interface has remained virtually unchanged since 1955. The LS engines introduced an additional hole at 12 o’clock and added structural oil pan attachments, which for most versions are the same. We have several of the latest enhanced castings to meet your needs whether it’s an old school 283 or an LS3 Crate engine.

These bellhousings are all cast from quality aluminum alloy and the most current enhanced pattern. All will accept large 168 tooth flywheels and up to a 12" clutch.

Kit contents:

• Bellhousing, Classic or LS style, large bore or small bore
• Lower cover, stamped steel
• Clutch arm pivot, adjustable
• Boot, clutch fork

Applications & Compatibility

Engines

Fits 1955+ Chevrolet V8 pattern engines which includes

• Chevy Small Block
• Chevy Big Block
• 90 degree Chevy V6 (4.3L, etc.)
• Chevy inline 6
• LS Gen 3+

The LS Gen 3+ bellhousing has the hole at the peak of the bellhousing (12 o’clock) and the correct holes for most stock oil pans. There are a few applications that use odd locations for those lower holes that will not line up. In that instance, you can replace the oil pan with a standard type or leave those bolts out.

Transmissions

All bellhousings have the standard GM Saginaw-Muncie bolt pattern on the rear / transmission side. The large 5-1/8" bore are specifically used with the SM465. Most other transmissions will use the small 4-11/16" bore version. A large bore can be stepped down with our BR4 centering ring, available in Related Products, below.

5-1/8" bore versions

• SM465

4-11/16" bore versions

• SM420
• AX15 & 3550
• T90
• T150
• T14, T15
• Jeep T18
• T176
• Ford Transmissions including T18, T19 and NP435

... and others. Any transmission that accepts the standard GM pattern will work.

Related Products