The other non asked question was $$$
A 3.4 or 3.6 conversion is likely $12k-15K, maybe more? That's a lot of money to dump into a car whose resale value might only be $12-15K by the time you do the conversion. It might be "cheaper" to sell the 2.7 and to buy a "then used" 987S for example. Just a thought.
Having spent $8k in "upgrades" to my $6k 914 years ago, I too must say it was not the most economical upgrade, but it was fun
