You need a different trans, wiring, computer, radiator..... Easier to but a whole new truck.
The 5.7 Liter Hemi had 345 Horsepower in 2007 & 2008 - went up to 390 horsepower in 2009
16
The stock 5.7 liter Hemi in a Ram Pickup is 348 Cu inches and 345 HP.
Bottom of the oil pan.
345
No
Divide by 100 to convert centiliter (cl) to liter
425 hp
7 quarts
four
390
No