BowtieDick37

I know I know, there's prolly a million other threads out there for this. As of right now, I have a 01 Z28 cradle including struts and full brakes. Looking to find the perfect 5.3 to drop in and get around 400-500 hp. So what blocks (iron) and head combo would be the smartest and or cheapest? I'm using a 01 AUTO harness with my stock 4L60 from the V6. From what I've read, trans should bolt right up. I also purchased a complete WS6 rear end as well. Besides frame connectors and need for upgrade on suspension, what else do you gents think I would need to complete the swap?

BowtieDick37

I also will be upgrading trans in near future to a 4L80.

G Atsma

Go for Gen IV (06 on up), as they have better bottom end parts and 243/799 heads. Plus, being newer, will likely have fewer miles on them. Plus, they will have a good tranny behind them. Get it with the engine you pull from the truck.

BowtieDick37

Excellent! I also was told that the fuel pump and full fuel lines are different. Replace those as well?

G Atsma

There are threads on here telling how big fuel and return lines should be. Do a search for the correct info. It will be better than anything I would tell you.