318 v 340 Crankshaft

Dartboy52 said
Yes but what they are saying is it will be cheaper to remove a bit of weight then have to add weight. So there will be a bit of cost savings in using a 340 crank over a 318 crank in most cases. If you aren't going for a screamer then a cast crank will be fine.

I understand that, my point was that most aftermarket pistons are still lighter that stock 318 pistons so you probably wouldn't have to add weight. I would weight everything first if it is a concern.