On my 1995 chevy caprice the battery is new altenator good replaced fuel filter and spark plugs and wires, sometimes it starts some times it dont and now it will shut off sometimes when i put it in drive. today the head lights and instument lights wouldnt come on and i jiggled the wires going in to the fuse box under the hood by the alternate positive battery post and they came back on? any ideas? oh and it developed a miss in it in the last couple of weeks.

Sort of indicates the electrical distribution needs attention. Good that you replaced the battery and alternator but you still have an issue with some power loss, like wiggling wires restores connectivity. Start at the battery, use a wire brush, and some water mixed with baking soda if you see any green or powdery corrosion to dip your battery cable ends in. Usually the wire brush cleans well enough, you want all connections shiny metal to metal contact. Follow both cables and the splices or pigtails to where they connect, like that alternate positive post. The more you can remove, clean, and retighten all the connections you can, the more likely you wont have such gremlins reappear.