Converting from 318 to 360

Rumblefish your are correct it is the performer edelbrock intake. Im not sure in the horse power rating coming out of the 360. My dad was fixing a ram charger (electrical problem) and the guy couldnt pay him and was leaving town. So he wanted to sell the 72 4x4 ram charger to my father. My dad didn't need the the extra truck. So he just gave it to him signed pink slip and all. It had a freshly rebuilt 360 long block. The motor wasnt installed, it was in the back of the truck. So I bought it from my dad. I took a look at it, it has new pistons heads I cant identify. So am I taking a big chance in dropping in this motor in my cuda? I wanted to break it down completely. But my dad talked me out of it. Now the only thing throwing me off is this external balancing. By purchasing the balanced B&M flex plate and installing the front 360 balanced dampener. Will this solve the external balancing that is needed? Also on another note. My colling system now is great. My car does not overheat in traffic. And I get plenty of it in Los Angeles freeways. Although I not running a fan shround. I thinking of going with electric fans. Dgc thanks for the info on the radiator.

P.s.

I have the casting number off the block:
4179930.360.3
06.14.79.360
raditor number stamp on top is:
38086