WIRING SHORT OR CHARGING PROBLEM

[payne1]

I HAVE AN 86 MUSTANG THAT HAS AN 78 WINSOR 351 ENGINE THAT WAS PUT INTO IT. BUT I AM HAVING PROBLEMS WITH THE BATTERY GOING DEAD ON ME. IF I LEAVE THE BATTERY CONNECTED TO THE CAR IT WILL DIE OVER NIGHT. AND IF YOU TAKE THE CABLE OFF OF THE BATTERY WHILE THE CAR IS RUNNING THE CAR WILL DIE. I NEED SOME INPUT ON WHAT COULD BE WRONG. THE CAR ORINGINALLY HAD A 4 CYLINDER ENGINE WITH FUEL INJECTION. AND NOW IT HAS AN 351 WINSOR IN IT WITH A CARBURATOR SYSTEM. IF ANYONE HAS ANY SUGGESTIONS I WOULD LIKE YOUR INPUT.:confused:

[facemelter71]

Did you check the battery voltage while it was running with a volt meter?
Should read some thing like 14.5-14.7 volts,or some thing close to that.If its reading battery voltage,around 12 or so, then you need a new alternator.