I would still do a 6 week PCT after cycle, 2 weeks to clear then start your PCT. then do that 4 weeks and start the SARMS.

As for timing of sarms, both cardarine and osterine have long half lives. 18-24 hours if I remember correctly. so take them whenever. I just took mine in the morning and trained at 4 pm to 7 pm.

I do an abbreviated PCT after I do SARMs. Nothing big just wait a week (no esters to linger) do clomid or nolva for 2 at lower doses than I would with gear.