Looking for any site with info on how this will work. Plan is to rebuild LT1 to .030 over, keep stock pretty much and use existing tranny (hooked to 4.3L) 4L603 4 speed automatic currently in truck. Not looking for anything fancy, just reliability and some fun.  Would like to use the LT1 computer and engine harness assembly from a donor with a little recal if necessary to do this. Any help is appreciated.