Have transplanted a SIMCA Rallye 2 1294cc engine in my 133. The fact that the SIMCA 1000's heritage goes back to the small FIATS meant that some parts of the conversion were easy, like the FIAT driveshafts fitting directly into the SIMCA gearbox without any modification.
Regarding the anti clockwise engine rotation (which the SIMCA 1000 shares)...I've successfully transplanted a Honda CRX 1590cc twin cam (also anti clockwise rotating) into my trackday SIMCA 1000 using an adaptor made from the Civic/CRX bellhousing mated to the SIMCA box..
will post a photo of the 133 in action when I work out how to on here.