the 240Z bumpers don't offer anything in the way of protection, the main
concern is really just to get them mounted up. The existing 280Z bumper
shocks must be removed. For the front this is no big deal but the gas tank
must be dropped to remove the rear bumper shocks. While you are in there,
clean the area, repair any rust and paint or undercoat both the car and
the gas tank.
Robert simply used 1/8" x
1" aluminum stock and bent it to the correct shape for his bumper
mounting brackets. The ends of the 240 bumpers bolt-up where the 280
bumper rubbers originally fastened down.
We have also seen a how-to out there
on the net the kept the existing bumper shocks but required letting the
fluid and air out of them, compressing the units and then mounting up the
bumpers. Either method should
work fine. Just remember that you are losing a margin of safety along with
that extra weight!