When should you use chrome moly pushrods?

[king-918]

I have a non-roller 350 bored .60 with vortec heads (worked over), LT4 Hot Cam, roller lifters, roller rockers, and comp cam beehive springs.

would flex be an issue with the normal push rods should make about 400hp with a 6200 redline?

cam spec;
This hydraulic roller cam is for service only for all V8 engines with
roller camshafts. The duration at lash point in degrees
(intake/exhaust) is 279/287; duration at .050" tappet lift
(intake/exhaust) is 218/228; and maximum lift with 1.6 rocker ratio
(intake/exhaust) is 525/525. Valve lash is zero/zero and lobe
centerline is 112 degrees.

these are the pushrods i was looking at
http://www.summitracing.com/parts/CC...s/?prefilter=1