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Jetronic injection vs. Carburetion

Engine

Vehicle Information: Year: 1979; Body Type: Coupe;

I have a basically stock 1979 911SC coupe. Only mods at present are 17" Lindsey Racing P3 fuchs,a Nardi wooden steering wheel and a Stebro stainless exhaust system 2 in 2 out. It has Carrera tensioner upgrades and pop off valve. It has 174,000 miles and I'm getting a little bored with the lack of power but I love the car's looks, lines and how it handles. I am contemplating a significant non stock, we will call it a restoration, but the car is real clean and it will simply be some improvement modifications. Car is tight , doesn't leak oil at all and is rust free. I am going to have it painted and figured I would redo the engine and tranny at the same time before something goes wrong. I have talked to several so called Porsche engine specialist who both suggest increasing displacement but they are conflicting in reccommendations on fuel delivery systems. I want hp and speed without sacrificing reliability but this will not be a daily driver. I requested and one of the shops agrees with a PMO carb conversion from the stock K-jetronic system but the other shop says they won't put anything but a fuel injected system on the car because the PMO's will not be reliable, won't work on pump gas, and something about improper fuel pressure. This is not a money issue. I will be spending money I'll never get out of the car but I want to have one of the nicest 911's out there but I don't want to have to work on it or have it serviced after every drive. If I did , I would buy a Ferrari. Can you shed some light on this.

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