Nah, it seemed that the short 127mm rods were only used in the 964 by Porsche because they otherwise had a engine-width problem...
All serieus tuners of 964 engines try all sorts of desperate measures to lengthen the rods to get a better (read higher) rod ratio (sorry).
I tried to keep it cheap and used lightenend stock 2 liter rods, converted to 23mm piston pins. Its now about the same width as a stock 2 liter type 4
.
Greetings,
Walter