Sixpack on a 318 engine ?

okay i stumpled aver this Six Pack and the price was right. I know a 340s would be cool but the only thing i have is a 318 which i plan to rebuild the cheap way. Hone it, , new rings and so on, a basic re reing job.

What you guys think, is it a bad idea to use the sixpack in this ? And if the answer is yes , what cam should i use?
Car will be a 66 Barracuda with a 904 automatic not sure about the rear end ratio. Converter stock.