Generally easier to pull the motor with the trans attached. You may need to have the front end fo the car lifted up on jack stands to give the tail of the trans enough room to tip down as the engine/trans needs to come out at an angle. A load leveler on the engine hoist is a near neccessity if you pull both of them together.

140/120 cars are easier, because you can pull the radiator and the sheet metal infront it too, so there's a clearer path out, but the 1800 is all one-piece sheet metal. You will have to take the radiator out. Helps to take the manifolds off too.

There are no lifting lugs. A diagonal attachment works best, from the left front corner of the motor to the right rear, since the motor needs to lift straight up but there are no attachment points down the center line. Using a manifold lug on the right rear always seemed a little iffy to me, I usually used the head bolt. And on the left front, I use one of those bolt holes on the front of the head.
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'63 PV544 rat rod, '93 Classic #1141 245 +t