Well, Im in the USA and know no one near me remotely proficient at makng them.
As to the drive train, LS1 chevy (396hp/428tq), 4L80e (4speed auto built to handle 900hp by Monster Motorsports), Lt230 (built by Ashcroft w/ 1:1 high range), Lt230 to 4L8e adaptor (by Marks4x4 in australia), Ashcrofts new underdrive, soon to have Portal Tek axles once the gearing is sorted for highway use, 37x12.5 SSR's.