This is probably going to sound stupid and I know my car is not a low rider but for childhood purposes living in the UK and hard to find an actual low rider
Do you guys reckon if it is possible to add hydraulic system on a 1966 Chrysler 300 Convertible?
Anything can be done... Just have to be prepared to do a ton of work and spend a lot of money.
The conversions I've seen use either GM or Ford front suspension pieces and involve substantial, no going back modifications. If it isn't done correctly, it will pretty much make the car worthless. Since you're asking if it's possible, I'll assume you haven't done this conversion yourself, and may not have the tools/knowledge/experience to do the work, so do you have a shop in the UK that does this? And does it right?
Everything is going to be expensive.... Even more so since you would be importing most of the parts.
Now, here's my opinion... I think the low rider "look" is passé. Your car would look stupid and out of date. It's an easy car to lower a couple inches without breaking the bank (adjust t-bars and add lowering blocks) and that's a classic look that can be "undone" when you get sick of it. I never hear about how these cars handle and steer after this is all done.. Again, if not done right, it's going to be horrible to drive. Even if it was done here in the states, the shops are doing GM cars primarily and Mopars are far and few between.
There's very few members that have attempted this conversion, and I can only remember one that documented the work... and I don't think they showed the completed car. IMHO, a lot of these projects are started, ending up failed or stalled, and never finished. There was also a fuselage convertible that was documented on another site and quite frankly, I was not impressed with much of the work. So, if you start the project, you aren't going to get any help here...
I gave this opinion (with some basic facts) and got called some names before. I just try to be honest.... and I really don't care what you do with your car.. I'm not the purest that I'll probably be called. Got a lot of money and somebody to do it correctly? Or.... Got the cash, skills, and tools to do it yourself? Great go for it... Just post the pics and driving impressions after the fact.