What motor and where are the parts?

[BR3W CITY]

Gen III motor, its an LQ4 engine code aka "LS Truck Motor"

What rebuild parts?....thats like asking where to buy sbc parts....anywhere

Summit, jegs and the like carry most aftermarket and common swap parts you would need, including some performance stuff. Depending what you want, there are a few more specialty vendors....need to know your end goals for the project.