Rules m8 Gotta have a functioning radiator and catch can (for midwest anyways) Everyone over-bored the motors to accommodate for running with no coolant.

oil cooler in line as a radiator

ratchet strapped a tree branch to the side of my truck to keep the axle and tire from walking out (C-clip in diff broke)
dead battery in middle of nowhere with noone around - took belt off, took bar out of chainsaw, wrapped chain around alternator and pulled back and throttled out to charge the battery.... it fired up. needed a new pulley tho lol