For 1978, the Olds Cutlass downsized to stay competitive in the evolving domestic car market. While the malaise era G-bodies weren't great performers in stock form, the capable architecture they were built upon lent them to hot rodding.

When adding a 5 or 6-speed transmission to your classic muscle car, we have the driveline conversion components you need. Whether it’s a shifter, transmission crossmember, or tunnel patch, we have the brands and components you need to upgrade and complete your driveline conversion. Most parts in this category assume you will be keeping the original engine. For engine and transmission combination swap parts, look to the Engine Swap Parts Category.