Will a b20 head mount to a d16 block?

Yes, a B20 head can be mounted to a D16 block, but it requires some modifications. The B20 head has a different bolt pattern and coolant passages compared to the D16, so you'll need to ensure proper alignment and sealing. Additionally, you may need to adapt the intake and exhaust manifolds to fit correctly. Overall, while it's possible, it’s not a straightforward swap and requires careful planning.