How to Install an LS2 in an LS1 car
To utilise the existing LS1 harness and LS1 computer the simplest way is to convert the new block back to 2005 LS2 spec.
Inspect your new block.
When looking towards the rear of your new engine on the passenger side at the back, behind where the starter goes is the Crankshaft Position Sensor. What colour is the actual sensor ?
Black..[you have a 24x crankshaft reluctor wheel].. go to Step 4
Grey ..[you have a 58x crankshaft reluctor wheel].. go to Step 2
Grey Crankshaft Position Sensor (CKP)