I replaced the dampers & springs on my HF turbo ie about 4 years & used Monroe dampers & SPAX springs that are 40mm lower. The ride is a bit on the firm side but I'm happy with that but the Monroe dampers have got quite a bit of surface rust on them already which is surprising as I rarely drive my Delta when it's raining
. As long as you use standard size springs & dampers the handling should similar but a bit firmer as it's new.
Thank you Rob,
I got Monroe dampers and new bumpstops from Autodoc and very reasonable prices.
The rears are unobtanium, except for the Integrale models from Lancia specialists. I managed to get a pair of rear nos dampers for cooking Delta/Prisma from Italy.
Now I may be able to put the front mudguards back on without them scraping the road! Yes, still a lovely ride, I kept the original springs, but less saggy and not hitting the stops now.