ok i had a 302 dropped into my 66 mustang and had issues with the shop. they claimed they finished the car but its got a few issues. I cant get the car to start now. It is making a grinding noise from the starter solenoid. Ive tried jumping it with the battery still in the car and directly to the cables. then i replaced the starter solenoid. i just pulled the starter and we tested it two times one time it failed and the other time it passed. the gears looks worn so i decided it would be a good time to just get a new one. I put that in and still just have the grinding noise from the solenoid. i also checked to make sure the line from the solenoid to the starter wasn't grounding out to anything. do u guys have any other ideas what it could be ?