911s motor @ SMC ?, seems ok but... Options

[porschetub]

Got a black Friday special from them this motor included,no real rebuild history 300 miles since rebuild ,increased compression and numbers supplied which really if a rebuilt motor would be a little off the game for only 300 miles (15+%).
Factor in 2.7 issues and it sounds like a cheap build @13.5 K even its a complete motor,things that come to mind;
Case clean ,measuring and possible line bore and resize,
bearings gaskets, chains and ramps,
pistons and barrels...can of worms costwise,
head studs which would need replacing,
crank ? measured ,polished/reground and cleaned,
heads,cleaned,flycut ,new guides,exhaust valves @ minimum,
rocker arms,cleaning measuring,rebushing if needed,
oil pump stripped and inspected,
parts for injection system,injectors tested,fuel distributor etc,
plus altenator rebuild,clean ,paint engine tin and shroud,
new exhaust fitted,
then sh#t loads of labour to box it up,
etc etc.
Numbers don't work for me if all the correct work has been done (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) ,need this for possible purchase of a 2.7 which I don't really need (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) .
Anyone rebuild a 2.7 and can confirm numbers for a rebuild to a similar motor /
TIA.

[mepstein]

Cost the same to rebuild a 2.7, 3.0 or 3.2.
I would rather have the two later ones.

[sithot]

Cost the same to rebuild a 2.7, 3.0 or 3.2.
I would rather have the two later ones.

(IMG:style_emoticons/default/agree.gif)

3.0 or 3.2. A "good" 2.7 is ok but it requires more work. Case Savers or Time Serts if the engine suffered "pulled" studs. The really hot running Thermal Reactor '75-'77 cars were notorious. Line boring should definitely be considered.

The 3.0 and 3.2 will eventually break studs. Last two SC's I owned required all the studs to be replaced. Breakage isn't uncommon and I for one would budget for a top end rebuild when purchasing either engine. FWIW: The SC rod bolts are larger so it's a bit more hearty. That's something that could be addressed with a full rebuild but either car should last a long time on the stock bottom end unless you're beating it like a rented mule.

The 3.6's cooked their exhaust valve guides due to the engine tray (for sound abatement) which as best I can tell was better at keeping oil off the floor because it sure as heck didn't dissipate heat.

I'm not a big horsepower person. A really sweet high strung 2.0 or 2.2 would be fine. It's all about balance. Gearboxes are another place to find hidden "horsepower". Stacked gear sets/close ratio/airport etc. are a lot of fun and if done right can keep the engine in the "sweet spot".