[Tom '74 911]

You might be able to pick up a core 2.7L motor pretty affordably, but the required extra machining costs will more than make up the difference in initial cost compared to a 3.0L or 3.2L I think. The 2.7L mag. cases, once opened up, 'relax' and thus require extra care at the machine shop to make sure everything is square when it gets put back together so the crank doesn't bind during rotation etc... - so I've read about 100 times here!

If you don't have a period specific car that needs a correct 2.7L and are just building an engine for fun, maybe a 3.0L would be a better choice?

That said.... I'm steading my wallet, patience and nerve as I am preparing to embark on a 2.7L rebuild myself (for a '75 911)... Just starting disassembly now...

Tom