Should I bore a 74 318 to 340 ci or just go with a 360?

stuff the 318 in the corner.... in storage...

find a 360 and stroke it up to 408 ... best of all worlds..

when done just put the 318 back in.. and now you have a 408 for other uses....

As much fun as a 318 could potentially be... i am sure later you will want more!