Hey , just about to take my fully rebuilt 3.9 outta my discovery. Its got 4.6 heads, uprated cam , duplex timing chain all bearings done new oil pump, piston rings, lifters push rods all gaskets etc. basically the works got toms of receipts runs really nicely got videos. Its done less that 5,000miles from rebuild, was run in properly with running in oil and assembly lube on all moving parts. Get in touch for more details / info cheers ben