I see c2 calls for 200pf and I have 180 or 220 - are either of these acceptable subs? Thanks
Yep. just blindfold yourself and pick the first of them you find!
This cap is a low-pass filter, basically bypassing treble so that it's never amplified. Small changes in its value actually become fairly severe as you increase the gain of Q1. In either case, if you want a smoother fuzz, go with the 220. If you want a slightly brighter fuzz, go with the 180. Or put a 22pF in parallel with the 180 to get to 200.