Will a 1.6 cvh cylinder head fit onto a 1.8 cvh block?

Yes, a 1.6 CVH cylinder head can fit onto a 1.8 CVH block, as both share similar design characteristics within the CVH engine family. However, it's important to ensure compatibility in terms of the intake and exhaust manifolds, as well as other components. Modifications may be necessary to optimize performance and ensure proper sealing. Always consult specific engine documentation or an expert for detailed compatibility information.