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matching engine numbers


Vehicle Information: Model: 911 T; Year: 1972; Body Type: Coupe; Engine (type, size, modifications): 6 Cyl stock orig.; Total Mileage: 80,000;

My question is did the engine numbers match the chasis number of the car at the factory at the time of build on these early 911 cars? I have an all original, unmolested, rust free 911T '72. I was experiencining oil leaking onto the exhaust this summer so I brought it to a highly reputable Porsche engine builder for the winter for a thorough engine out servicing. He discovered that at some point the engine experienced substatial overheating which warped the case and cylinders etc. He found significant mice nest buildup and hardened around and clogging the cooling fins. ( I was aware that the car had been stored for a signicicant amount of time.His advice is that to repair this correctly and to ensure a leak proof result would be extremely expensive, new cylinders, new pistons machine the case etc. He offered an alternative: replace the engine with another '72 911T engine. According to him the engine numbers did not match the VN #'s from the factory and that any '72 911 T engine would result in a "numbers matching" car. When I bought the car it was important to me that it was a numbers matching car with the original engine from the factory. How important is it upon resale that the original engine is in the car? I do not plan on selling this car any time soon, but I am concerned about negating any potential investment value by changing engines. Any help or advice will be greatly appreciated. ThanksCraig

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