Rebuild a 2.7L or 3.0L six motor, which is cheaper? Options

[boxsterfan]

Which /6 motor is cheaper to rebuild? 2.7L or the 3.0L?

1. Assume core motor is in good condtion and no crazy findings when you tear it down.
2. Assume you are building the motor for longevity
3. You are putting this in a 914/6 conversion (was /4)

[Steve]

Lots of pro's and cons
2.7 Pro's
Magnesium case = lighter
Can use early 914-6/911 2.0 flywheel and stock 914-4 2.0 clutch. Clutch feels just like a stock 914-4 2.0
2.7 Cons
Case is weaker. check out Bruce Anderson 911 performance hand book. Might need case savers, timeserts and special head studs. I used to have a 2.7 and when it started to pull head studs, i sold it and bought a used 3.2 from a wrecking yard.
Cheaper than overhauling the 2.7. 3.2 stock injection is really nice, but I wasn't happy with the 914-4 gearing and ended up spending big bucks for a 916 gear box.
3.0 pro's
Case is much stronger and doesn't require the above
Known as the most reliable 911 motor
3.0 cons
Heavier
Requires special adapter flywheel to be used with 901/914 trans, unless you convert your 914 gearbox to a pull type clutch. I was not a fan of the special KEP bus clutch adapter flywheel. Harder to push compared to stock

My advice is think about your end goal before plunking tons of money down. Try to drive both. Get multiple estimates to rebuild both correctly