Range Rover 4.4 06+ crank, connecting rods, and pistons. Have them bore the block to take care of the walls and to accept the bigger pistons. Get some used LS V8 heads off ebay and put it all back together. Stroked and bored LS. More horses. And before anyone starts in on me, I have been doing extensive reasearch on this whole issue with the Jag guys, the main reason I haven't been on here that much. 3.9 destroked 4.0 4.2 is a stroked 4.0. 4.4 is a bored 4.2 with the same stroke. The deck heights are all the same. The crank was milled to accept the new stroke, the deck height was never changed. All the pistons except for the 4.4 are 86mm. The SC 4.2 used forged pistons 9:1 aluminum alloy @ 86mm, but the 4.2 block had oil squirters for piston cooling. All cranks were cast not forged, with the exception of the Aston Martin, which can't be used. They still sell SC pistons for the 4.2 labeled under Range Rover as they still produce the 4.2 SC for that SUV. The cam profiles for the LS, S-Type, Xj, and XK are actually very aggressive mind you, hence why no one has made aftermarket cams for these cars, plus the cam would end up eating a tappet or bucket. A crank would run around 700-750. Rods would be $1000, and Pistons anywhere from 60-100 bucks. I'd stick with an NA setup just to be safe and save money. Jaguar is very economical with the way they do their motors. They are notorious for stroking motors, hence the reason for all the AJ series. The 5.0 is a no go because it's a different block design. Still an AJV8 but with a whole different attitude.
