Hey! Welcome to the forums. I think you're one of the first Infiniti owners I have seen here on the forums. I just completed a quick search on Google and found out some basic stats on the J30:
Wheelbase, in. 108.7
Overall Length, in. 191.3
Overall Width, in. 69.7
Overall Height, in. 54.7
Curb Weight, lbs. 3527
Cargo Volume, cu. ft. 10.1
Standard Payload, lbs. --
Fuel Capacity, gals. 19.0
Seating Capacity 5
Front Head Room, in. 37.7
Max. Front Leg Room, in. 41.3
Rear Head Room, in. 36.7
Min. Rear Leg Room, in. 30.5
Engine: DOHC V6 3.0 210HP 193TQ 4-speed automatic Transmission
Personally, when I first saw that car, I was like "uhm...I don't know" Now after seeing it up close and personal, and I have realized that that car has some serious power, and some really neat options, and would definatley be something to consider if I was looking for another car (which I am, but its gonna be an 89 S13 240

)