Hi Steve,
Firstly, welcome to the forum.
It sounds like you have some wear and tear going on with your car. Your steering rack could be worn, or the inner bush could have disintegrated, tie rods could be worn. I would also check the condition of the front anti roll bar bushes and the wishbone bushes too.
How many miles has the car covered? And where in the US are you located? Heat plays a part in fatigue of bushes.
If its not the ARB or wishbone bushes the steering rack has to come out and thats not an easy job unless you have it up on a ramp even then it is a bit fiddly.
If it were me I'd replace all the bushes as it's easier to do the lot while the car is up in the air.
Have a look at the Beta Parts website and Look at the "Steering" and "Suspension parts " section. I've just rebuilt a manual steering rack and am in the process of replacing all the bushes at the front. I bought all the parts from Mark W here at this link
http://www.lanciabetaparts.co.uk/
