Will Chevy rally wheels bolt up to a 86 cutlass?

It's unlikely that Chevy rally wheels will directly bolt up to a 1986 Cutlass without modification. While both are GM vehicles, the bolt patterns (number of lug nuts and their spacing) are often different between even GM models from the same era. The Cutlass may have a different wheel bolt pattern than the Chevy wheels.

To know for sure, you need to determine the bolt pattern for both the Cutlass and the Chevy rally wheels. This information is usually stamped on the back of the wheel. Common bolt patterns are 4x100, 4x108, 5x4.75, 5x100, 5x114.3, and others. If the bolt patterns match, the wheel size (diameter and width) and offset need to be checked to ensure proper fitment and prevent rubbing against suspension components.

In short: Don't assume they will fit. Verify the bolt patterns first. If they don't match, you'll need wheel adapters (generally not recommended due to safety concerns) or different wheels.