Also like he said with kr, i got really lucky being at a high altitude i was able to have 0 kr with stock flow. But i had a pcm tune from zzperformance which supposedly killed knock a little bit. If you plan on running stock yes pulley up to a 4.0 but with those flow mods do as he said scan for kr and see where its at and move up or down from there. Compression on an l36 is going to need those flow mods to not have knock so your right on track