Find TDC on SL-6

What is the best and easiest way to find TDC on my SL-6? In the past I rotate crank bolt on an engine stand and watch No. 1 valves until closed. Now engine is in car, fan blade interference causes a hassle to access bolt, removing valve cover is a hassle also but ideal, spark plugs can come out and not a big deal.

How do you rotate newly rebuilt SL-6 after installed to ck timing? Helper (wife) in car and "bump" start, remote starter sw to "bump" start?, use crank bolt and long ratchet?

Many thx...