318... to stroke or not to stroke???

...first, a 318 piston...

http://www.summitracing.com/parts/uem-kb167-030/overview/make/dodge

next...a 390 piston

http://www.summitracing.com/parts/uem-ic847-030/overview/make/dodge

Observe the differences in CH...ICON is sold by UEM, the same people who make KB...both are pretty good pistons for their given purposes.