solid roller cam button / timing cover questions HELP

Cam Button:
http://www.summitracing.com/parts/cca-206/overview/make/dodge
or
http://www.summitracing.com/parts/lun-90004/overview/make/dodge

Timing cover: Milodon makes this one with a reinforced steel plate for the cam button
http://www.summitracing.com/parts/mil-65651/overview/make/dodge