Hello all I am new here. My truck is a 1987 Chevy R10 SWB Stepside but I am here because I am installing a LS1 in the truck. I have not had an engine this new sure I will have a lot of questions. But right off i needed to know if the throttle body will interchange from an 03 to an 01 I need the 01 body because it is cable operated. But as you all already know the 03 is electronic. i know they have the same base gasket but will bolt up?