Quote Originally Posted by all-mota View Post
either one is ok but if you run the block guard make sure that after you install it you bore the cly's because pressing them in can make the cly egg shaped
VERY GOOD INFO. You ALWAYS want to put in the block guard first.

For the power you want to make I say no you don't need one. I believe block guards are just there to get you home. I have seen many motors (one only a few months ago) that had block guards and still cracked sleeves. However, each time the car was still running just not very well. I have seen motors without block guards (have a k24 here now with blown sleeves) and once the sleeve cracks the car will not run anymore.

I believe if motor is built right then you will be fine without one.