advice on engine combo

[jst4fun]

Ok trying to figure this out is about to drive me insane. Im building my truck as a daily driver show truck and light auto cross running. porterbuilt center section hotchkis suspension viking coilovers t56 magnum trans custom dana 60. Now to my problem can't make up my mind on motor. As I said mainly a daily driver but want good power and love big blocks. Was thinking of going with the 572/620 but dont know how reliable it will be for a daily. Fuel mileage is not a concern of mine but wondering what other peoples input might be as im almost to the starting point of this build after collecting most of my parts. So what are some ideas for power plants out there. Nelson racing is a year out as i wanted to get a 572 twin turbo daily driver engine but dont want to wait a year. any input is greatly appreciated.