How much would be the cost to convert air suspension to coil spring suspension?

Having it done at a shop, about $600 rear only, that is what I paid for the exact same thing on my Town Car

We don't need no stinkin' air...air?

If we could manufacture a superior elastomer that could last under varying conditions over time none of this would be necessary...run into this whenever I'm asked to restore an old car....all the rubber parts have gone to hell~nothing can be done except replace them~...or in your case a springy-substitute~

OUCH! You can do a basic kit for $189+ shipping. It would ride better if you replaced the rear shocks, which is a little more, it all depends on your budget. Btw, I would seriously check the front coil springs, as they are really bad about breaking and even puncturing a tire! http://www.americanairsuspension.com/Lincoln-Continental-Air- Suspension-Conversion-9702-p/9702contcv.htm

i have a continental 2000 thats been converted to coil springs now everytime i hit a bump its sounds like somethings loose making a banging noise ,what do you think it could be its coming from the rear end?

I replaced mine on my Lincoln Town Car 2004 and it drove exactly as good as it was with the air shocks and it only cost $200 to have it done the guy was honest that's what's hard to find