[The Geologist]

I think it matters most if you intend to keep the car very close to stock (obviously, a timeserted case, Carrera tensioners, turbo valve covers, etc. are considered "acceptable" modifications). In that case, I think matching numbers matter a lot, especially for a '74, because so many of the mid-years have rusted away or have been highly modified because they were perceived as "undesireable." Because of that, there are relatively few good examples of unmolested, numbers-matching mid-year 911s, especially the '74s with the chrome brightwork, narrow hips and missing passenger-side mirror, and extra especially the 1974 911s models.

I own a pristine, completely rust-free 1974 911s in a unique color with numbers matching engine and transaxle. The engine is a little tired and the transaxle grinds and whines, but there's no way I would ever replace them, so I'm saving up for a proper overhaul rather than a drop-in solution. When I do the engine I'd love to ditch the CIS for electronic fuel injection "while I'm in there," but while I know it would pep up the car and make it more fun to drive I also realize it would detract from the car's value.