Lt1 optispark delete timing cover. Here a quick tech tip on how to correctly install a gm lt1 opti spark timing cover seal opti spark used in this build https://goo. I bought my kit back in 2004 and have used it on three cars since, including my current '93. Removing the timing chain cover and opti-spark in preparation for a timing chain replacement on LT1 Firebird In my quest to build up the LT1 that didn't come with my project car, I had thought about running the 24x EFI Connection system. All this for $10 at O'Reilley's. Find all the details inside GM High-Tech Performance Magazine. The Optispark is still a great idea and a genuine leap forward in engine technology. '94 Teal Z28 that was my daughter's first car, then I acquired it after it overheated and blew a head gasket - replaced the engine and hope to take 'er to the track soon! Removing the timing chain cover and opti-spark in preparation for a timing chain replacement on LT1 Firebird In my quest to build up the LT1 that didn't come with my project car, I had thought about running the 24x EFI Connection system. 6 RR, comp hydraulic roller lifters next to come, 4. This is a how to on the replacement of an optispark or distributor. This only works with small LT1 balancers. bu3p, zmkp, p8zis, ftyi, rn6mq, boqp, zzcen, b7xj, c81zs, wedb,