I'm finishing my complete 3.5 rebuild.
So couple of questions, has anyone more tips & tricks and do and don'ts. before I tottaly mess up

Tommorow I will adjust the tappet preload, and will also fill the oilpump with grease.
I will problably use the valvoline vr1 20W50 oil. Should I also use this oil for running in the engine?
More tips on first start and running in?
I'll post some pictures when I figure out how to do so

Thanks in advance,
Greetings Aaron