My duster is being prepped for paint as we speak and i was considering pulling the motor to go ahead and respray the engine bay black. I don't know a lot about the current motor but it is a manufactured Chrysler 360 long block with part number R0501716. It is completly fresh and only has the cam broke it but from my understanding its just a low compression 360 with smog heads. I am looking to make 375-400 HP. Would it be possible to just throw in a set of kb107 pistons, edelbrock or comparable heads, ld340, holley 770 street avenger, and comp xe274h cam and run the car or will a complete tear down be necessary? I have never done anything along these lines so your input would be appreciated. I am also running an 8 3/4 391 SG, and i would have dynamic build a convertor to meet my needs.