will a bigger cam kill the torque?

ok so the 440 in my duster is a ...

68 block
.455 intake lift cam

10.5 - 11 :1 compression
edelbrock performer intake -- idle - 5500 rpm
440 stealth heads
ductile adjustable rockers 1.5
3000 stall convertor

current cam -

http://www.summitracing.com/parts/DCC-4286677/

if i bump the cam like this will it hurt torque?
http://www.summitracing.com/parts/CCA-CL21-600-5/