Its simple... pulling a motor is cake.... It takes meh 45 minutes to pull a motor and tranny out of a running driving datsun....
Just pull motor mount bolts, unhook throttle cable, un hook fuel lines, drain radiator, remove radiator, unhook any emissions stuff that is in your way, remove carb wires, remove battery negative, remove alternator wires, and remove any small stuff that im forgetting....
the easiest way to put a motor in is attach the tranny while its out, It sucks trying to mate a tranny and motor under the car or truck....
Find yourself one of these, it allows you to get a motor and tranny in at the same time because you can get a good angle, OBERG TILT LIFT