10 or 11 difficulty?
Rust repair on my '66 will be 1000x more difficult then putting a g50/2.5L sti motor in
An16 startlite hose run through heater ducts, and a heat exchanger in trunk (Real working heat) bulkhead fittings in fenderwells to rads setup, similar to stock oil coolers
I might just settle for a cheap $800 JDM EJ20TT ... then I can afford to blow up 8+ motors for the cost of one 911 rebuild

(Check recent thread on Japanese reliability)
__________________
The '66 912 Bastardization project has begun.
Note to PO's: LAY OFF THE FREAKING BONDO!!!!
The science was settled: Earth was flat.
Galileo : Flat Earth denier.