GM front Optispark delete. This aluminum plate bolts in place of the
vented (95-97) Optispark when converting to a carbureted application.
This has a tab on the side. Please note that factory LT1 balancers do
not use a keyway, nor are they notched for timing marks. Therefore, you
will need to set the motor at top dead center and etch a mark on the
balancer at the notch in the tab to label 0 degrees. The use of a
digital timing light is suggested to ease timing adjustments. Fits the
95-96 LT1/LT4 Corvette engines
95-97 LT1 Camaro engines
95-97 LT1 Firebird/Trans Am engines
94-96 LT1 Impala SS engines
NOTE : This does not work with 92-94 LT1 non-vented engines unless you upgrade to the 95, 96-97 timing cover.