Not a good idea IMO. Both clen and Ephendrine are beta-2-agonists which really screw up your beta receptor sites. That is the one of the main reason why its suggested not to run clen for over a two week period. I've never understood why people run clen 2 weeks and then ECA 2 weeks. It defeats the whole purpose of taking a break from the clen (since both are strong beta-2-agonists).
Taking an anti-histamine like benedryl is one way around the problem, but i still wouldn't go longer than 2 weeks on clen or ECA. Also, i 100% agree with the comment that 160mcgs is too high. i'd say HALF that amount will do wonders for you.