Can you put 454 heads on a 502 block?

Yes, you can put 454 heads on a 502 block, as both engines share the same basic architecture and bolt pattern. However, it's important to consider the compatibility of the intake manifold, as the 502 typically uses a different design. Additionally, you may need to address potential compression ratio changes and ensure that the valve clearance is adequate. Always consult with a professional to ensure proper fitment and performance.