3L block prep includes- filling the oil return holes for use with 2.5 heads, cutting off several tabs that aren't needed or are in the way for the re-install, taking apart the rods and mains to check bearing tolerances, replacing bearings with upgraded ones if desired, light honing of the piston bore, new rings if needed, reassembly of short block and install of new rear main seal. The shop doing the install must finish building the motor as this is shortblock only (I can do long blocks or full motors as well if you wish), install the flywheel, clutch, trans, etc and drop everything into the car.
Thanks,
Rick