[RonBo]

Definitly check your solinoid as in last reply
but before you replace the starter make absolutly cetain
that the battery is good.
My 79 had very much the same problems,
Juice to the lights and everything else but nothing but a click
when I tried to start it.
Jumping it didnt help,
Put in a new solinoid, no help,
New starter, still no help,
Battery voltage test said it was borderline but "useable"
but being the only thing left I threw in a new battery
and bingo, fired right up.
From what I was told the old battery had "sulfated".
Just to be sure I put the old starter back in and it was fine.