Its a 6L block that Im doing all this to. I have other plans for 5.3 block Im thinkin a rcsb late 90s s-10 5.7L forged internals with a 60ishmm turbo on it would be fun as hell and set it up to get great gas mileage and be a DD. I dont think a my 418 turbo and nitrous fed truck is going to be too driveable and get good gas mileage with a 3200 stall in my 5600# pig.