OptiSpark. The name alone is enough to give '92-'96 Vette owners the jimjams and send even the most jaded auto techs scurrying for their shop manuals. Indeed, with the possible exception of the ...

Editor's Note: Way back in March of 1998, GMHTP ran "Opti-Spark" by Ray Bohacz, an engineering-level dissection of GM's Opti-Spark distributor. This evolutionary ignition component was a bridge ...

For those of us old enough to remember '80s Reaganomics and learning about new math in school (what was the point of base 8 numbering anyhow?), our idea of tricking out a car used to be adding a set ...

The most common mistake made when installing an LTl into an older body style is to establish the coolant inlet and outlets in reverse. in the LT1, the coolant return from the radiator has the ...

The 1992 Corvette LT1 marked a turning point for Chevrolet’s venerable small block, taking a layout that dated back to the 1950s and dragging it into the electronic, emissions‑conscious 1990s. Instead ...