experienced bros on pct matters

[MASSIVEMONSTER]

just about to finish a six weeker (prop 450mg, tren 300mg week) nothing to much but its got me up to a leanish 217 at 5`8 so i am back on track.
going to start pct next week..

should i run nolva for 21 or 28 days at 20mg a day?
secondly, I have 1mg of igf. when should i start the igf? straight away with the nolva or wait a week into pct?

cheers