For Z-IMSA and G-Nose: If retaining original Datsun hinging, you will have to modify your hinges for the hood to clear the nose. We recommend having this modification performed by a vendor we use, and to whom we can refer you for direct contact. For $70, he will modify your hinges, including all drilling, welding, bead blasting, and acid-etch primer; ready-to-paint. Shortening and re-bending the hood prop rod is included!
For fiberglass hoods, we also recommend eliminating your torsion springs, as the fiberglass is much lighter, and the constant pressure of the spring can warp or crack the hood.