Are you trying to imply that changing from irs to a 4 link setup with a 9" diff isn't a quick, easy, and cheap modification you can do on your mum's driveway?
I enjoyed that one. It didn't contain half the video as moog talking about balls. But no real sleeper has a straight pipe on it. That power curve though. The barra motors just make power so effortlessly, pitty they weigh as much and are as large as a house.
Exhaust won't fit, intercooler piping won't fit, clearance to the clutch master cylinder is quite tight, cam belt covers need to be modded. Wiring isnt an issue from memory, it's just anything that used to bolt onto the head or between the head and block are now 38mm too low/short/out of place.
She wasn't pretty. But she got the job done. 4" dump, 3.5" front with flex pipe, 3.5" cat with 5" body, 3.5" to the middle muffler, 3.75" to the rear muffler and a 4" tip. 25/30 with a gt3582, 394kw @ 26 psi and 90db @ 3500.