I want to thank everyone , or at least most of you, for your comments and suggestions. I am pretty sure no damage has been done yet to bearings etc.. It ran 5 minutes at 2000 rpm and 5 at 2500 twice. It started to heat up a little hence the shut down between. I had a brand new Champion aluminum radiator and electric fan , new thermostat and stat was bad out of box. To answer mbaird it is a vibration at all rpm ,worse a little higher rpm but still noticeable at 900 rpm. I thought I was doing good but wanted ideas and to let anyone else as inexperienced as I am to know a few more things to consider when buying parts. Buying expensive mismatched stuff is not a good alternative