NM850
True Classic
I have seen (in real life) a Scorpione with a 128 conversion and I was going to post a reference but I can’t find it.I had a '70 850 H/P race car that I
used as an autocrosser. I replaced the 903 with a 1300 128 motor using a PBS 600/128 kit. It ran fairly well with a lightly modded engine. The drawback to this was that the gas tank had to be moved to get the 600 trans with it's top mounted starter in where the 850 trans came out. Mounts had to be made, shift linkage changed, but nothing really involved. At the time my biggest problem was starting it because the 600 starter just didn't want to crank the 128.
Later on when the kit was put in my 600 I used one of Paul V's adapters to use a gear drive Subaru starter and that solved the problem.
Now I know how it was probably done.