Jim,
It seems our DV's, built for the street usually run right at 200 lbs above a "standard" small block equipped CR's.
But, we install the best of the best as standard equipment. The full custom dash, heavier suspension components, a full width 4 point roll bar 13" brakes, etc., etc. This alone adds extra weight to the car.
But, remember the balance is almost perfect and IS easily adjusted.
By the way, that 711 lbs. for the motor also also included the A/C pump AND the starter! When we were going through the block, it was ridiculously easy for me to walk around the shop carrying the "empty" 10 cyl. block by one hand!
Now the crank is a complete different story!
DV