An update.
So I found some Bilstein B6 dampers for the Fulvia.
These were rather expensive but a Fiat Barchetta I used to own was transformed when I fitted a set of B4s (standard spec).
I didn’t think Bilstein made dampers for the Fulvia, but these seem completely genuine with the offset eyelet on the rears and correct length.
The dampers I removed were original De-Carbon on the front, still in perfect working order as far as I could tell. The rears were only a year old, supplied from Italy, gas mono tube.
Anyway in summary, the car now rides much better. Less crashing about, and much less body movement.
The whole setup is, in my opinion, still very firm. I believe the spring rates on my car are higher than I would like, but at least the dampers can now keep up.
My coupe is an original low mileage car from Italy and I believe the springs are original.
It’s interesting reading various reviews, tests and comparisons of the Fulvia.
One article comparing it to an Alfa 105 GT saying how much better the Lancia rode. Another article saying the complete opposite, that the Lancia seemed to lack suspension travel compared to the Alfa.
In general earlier S1s seemed to get praised for their comfortable ride, S2/3s less so.
I have read that the journalist John Simister, owned two Filvia HFs and couldn’t get on with them because of the poor ride.
Anyway I need to some more mileage, to properly assess whether my damper investment was worth it.
I’ll update in due course.