Can I use a 340 flywheel on a 318 magnum

I bought the mcleod flywheel for my 68 valiant. It has the option to change weights so in the future if I change combos I only have to change the weights bolted to back of flywheel. plus I like my feet. you also need the magnum metric flywheel bolts. Nobody that I found makes a cheapo flywheel for 318/360 magnums :violent1: