Can anyone tell me if you change the shape of a given antenna, will it
change the chararistics?

I.E.:

I have a 3 element 50 Mhz yagi on a 6 foot boom.

I want to mount the antenna in the back of my pickup-truck and if I bend the
elements down the antenna will fit within the confines of the truck (in
other words not stick out into the other traffic lanes). Therefore I can
still mount the antenna about 8ft off the bed of the trk and to keep it from
falling off I can guy it to the trk.

73's