Car won't start

I have an '86 jeep cj-7 with a 1979 chevy 350 conversion. The engine has been recently rebuilt with less than 5,000 miles. I have had it stored through the winter and have occasionally started it without any problems. This week I tried starting it and it wouldn't crank or even click. I tried again later, and it clicked repeatedly. I was able to jump start it and allowed it to run for some time, however, it wouldn't restart. I replaced the battery and have tried restarting it without success. It won't even click now. Any suggestions in this matter would be greatly appreciated. Thank You.