Cooling ???

[Gimmie1965]

Hey everyone have a radiator question. Have a 65 gmc with the 305 v6. Getting ready to be able to pull a 5th wheel camper. Down to installing a bbc. It's a stock 77 454. Have everything gathered and hoping to get started this weekend. Biggest question is has anyone done this and kept the stock radiator. It has a 3 core in it now. If I install a shroud along with what I think is a stock 6 blade fan and clutch. Maybe install a lower temp tstat. What's your thoughts