69 COPO Chevelle motor?????
 

I just picked up a motor that has T0408MP stamped on the pad. The block is a 3963512 casting # with 840 heads. Is this a COPO Chevelle motor??? What other info should I look for on the motor?

It was rebuilt approx. 5 years ago and has been started every two weeks to keep it in good condition (and to freak out the neighbors).

Any info will be greatly appreciated.