So I started my truck this morning and its on 7 cylinders....

[fire120ball]

Woke up, got dressed, hopped in the truck to go to school, and thats when it hit me, sounds like it in constantly hiccuping (<--- If that makes sense), So far I have sanded down the cap, and the rotor, checked all the plug wires. and no luck, tommorrow i'm going to check the timing, replace points and condensor, and if that doesn't help take out my plugs and maybe do a compression test.. and this is the funny part about this once I got to school and realized how bad it was missing. I threw it in park and gave it about a 1/8 of throttle and after the motor hit the peak RPM and was coming down I heard some metal hitting each other, it happened three times back to back. has not happened since though. Any input guys? thanks in advance!!