@CSU15919
As I understand it, the liners are cast-in-place and not easily swapped like many other engines.
There are companies who do this work. One of the most interesting is AutoFarm in the UK.
Don't know what kind of budget you're working with or what your ultimate goals are.
It is usually easier/cheaper to just do a total swap for a 3.2 - 3.6.
AutoFarm can
bore it out up to 4.0, but they're pricey. + I don't know what arrangements or costs are available for shipment to the US.
Nevertheless, their site has a good bit of info. See them at -
http://www.autofarm.co.uk/