It is HEI distributor for small block/big block replacement for Chevys.
Hei distributor:direct fit for GM application utilizing the 4-pin ignition module.
Clear HEI distributor caps Complete Distributor:283, 305, 307, 327, 350, and 400 small blocks, and 396, 427, and 454 big blocks.
High Quality: Heavy duty construction, high grade hardened steel gears. OE+ durability.75,000 high voltage coil spark through 9,000 RPM, upgrade for racing application
About service :HEI distributor ,the customer service period is 1 year .