The new MSD Opti-Spark cap and rotor are direct replacements, though MSD claims they're more durable and resistant to internal breakdown. They're also competitively priced with factory stuff ($150.88 at summitracing.com). The MSD Opti cap and rotor sets will include a new seal, hardware, and the aforementioned tool, but like the tool, we didn't get the seal or hardware with our test kit. Luckily our factory stuff was fine and we bolted it all back together. Order PN 8481 for early LT1 ('92-'94) and PN 84811 for late ('95-'97).