3-6 hours

if it was 2 guys and one car, maybe an hour-2

but three guys will get drunk and fakirone

if theyre old cars you can ****ing double that cuz the bolts will own you.

btw, to keep with the good blood have the owner of the car do the final torqueing. i let my "best friend" at one time bolt togethre the driver side of my car after we added stereo equipement and both my seatbelt and seat were rocking back and forth the bolts were so loose. come to find out he was trying to nail my girl, and i think he meant to kill me :-x