360 crank in a 318 block

I persoanlly like the factory type clutch fans, but if you don;t have room any standard factory fan will work. The problem with the flex fanes is the blades fatigue (meatl flexing back and forth will do that) and then they fracture around the rivets. If a blade comes off it can have enough eneergy to punch through the hood, or radiator, or hoses and belts...

On the plugs - I usually run Autolites as I have for years, or NGK race plugs if it's something special. I always found Autolites easier to read. I can;t stand Bosch - so I'd say anything but Bosch...lol.