The production 96-97 LT1 timing cover has several issues - it is no longer in production.

The newer 1995+ LT1/LT4 engines have a vacuum hose connected to pull the moisture out of the Optispark.

The LT1 is a great engine – with one huge problem - a problem that could cost you over a thousand dollars.

If done properly, The timing on the opti-spark can't be lost. Take them out and you should be able to pull the opti right off.

Our AIP LT1 Optical Encoder is temp rated at 330° and produces an accurate timing reference signal up to 8000 RPM, exceeding the OEM Mitsubishi encoder used in the AC Delco factory LT1 distributors.

1) I'm assuming this calls for timing chain cover replacement, correct? 2) If the answer to '1' is 'yes,' then does one really need to drop the oil pan in order to remove the timing chain cover? There is a lot involved with dropping the oil pan so if there is way to get around it I'd sure like to know.

The top hose from the Optispark goes from the Air Intake between the throttle body and filter somewhere.

As noted by many members, the LT1 and Optispark weren’t just used in Corvettes, the same system was also used in Caprice taxis, which regularly saw several hundred thousand miles.

The second hose on the bottom of the optispark goes to the Intake maifold itself I have tested the injector signals with a noid light, tested the fuel pressure (45psi), tested spark at all plugs- all were good. The most obvious difference that distinguishes the LT1 from these other engines is the front-mounted Opti-Spark ignition system.

The 'opti' has two parts, a low-voltage optical section and a high-voltage cap and rotor section. Includes new gasket set and attaching bolts.

These EFI Connection systems package well on the old LT1 engine.

Lt1 optispark delete timing cover Must be used with 1995-1997 Timing covers.

Lt-1 cam 350