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electrical/ should i give up??

Electrical

Vehicle Information: Model: 911; Year: 1971; Body Type: Coupe; Engine (type, size, modifications): 2.2 Pmo carbs, MSD; Total Mileage: 88,500;

My question is for a 71 911T. This will take a minute for me to fully explain so please stay with me if you can. I am only 20 and I bought this car last year after saving for several years for this reason. The car only cost me $4,500 but it needed a lot of work. It had a lipstick makeover (new interior new fenders new paint wheels etc...) It looks great but it didn't start and none of the lights or breaks worked. I got all the lights working minus the blinkers (they are next). I had all 4 calipers rebuilt and I replaced all the lines with stainless braided lines and got her starting and driving but not holding a charge. My alternator was bad so I replaced it but after first getting the wrong bosch alternator that didn't fit into the fan housing and finally getting the right Motorola alternator I started my car and the alternator light came right back on even after driving it around the block several times. I am pretty sure I need a new voltage regulator but I am not sure of the correct one to get? I used the haynes manuals wiring diagram for a 71T to hook the alternator up but I am not 100% sure if it is for a Motorola alternator or not? Can you send me the correct diagram for that alternator if you have it? Now besides that, the wiring in the car looks like a a spaghetti dinner there are just wires everywhere ( I sorted and taped up what I could but there are still tons of loose wires) it is kind of discouraging for me a 20 year old backyarder who is trying to fix this stuff for the first time. I am not sure if it needs a new harness and if it does how much would it cost to get one and have it installed? The car is awesome but I am not sure if it is too much for me to fix? I have debated selling it and getting a newer more sorted SC, or a 944 what do you think? Id really appreciate any help you can give me. Thanks-Ryan

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