So i got a spare head around and want to put a stage 2 crower cam in it with valve train in it and was wondering if i would need to upgrade my bottom end?

 

Im not really sure the specs on that cam, but make sure your valves wont strike the top of the piston. Also careful how high you rev with a stock block.

 

cam specs are

Advertised Duration:319 / 310
Duration @ .050":235 / 223
Gross Lift w/
1.6 int /1.8 ext:432 / 436

Description:Stage 2 - Street/Strip with slight lope at idle due to increased primary and secondary lobes.
Requires 84166 kit.
900-7500+ rpm.