I had taken this car down to Paso Robles before and used it for daily commuting and local round trips of around sixty miles or so, but you never know...
The vehicle I'm driving right now broke down on me last summer on the way back from Las Vegas, over three hundred miles from home. (At least it waited until then!) The a/c compressor seized up on me with only about 79k. Still you fix it and move on. So the question is "How can you trust your old car?" That's a good question.
If you can't reasonably trust your car then it's nothing but a big toy. You can drive it around town but no further than you care to walk. This of course makes perfect sense. My Dad always reffered to fixed up or restored cars as "Sunday cars" because that was the only time they are ever driven. He reffered to customized cars as "homemade cars." This was not meant as a compliment. My Dad would work on and fix anything, he just didn't see the point of making more work for yourself.
I think it all depends on the condition of the vehicle. If it is clearly worn out then it makes sense to stay close to home. But the question is how worn out? If you go to buy new tires the salesperson will always reccommend a four wheel alighnment and new shocks and struts. I asked him why, this was for one of my good cars that had only about 60k on it, this was the first set of replacement tires. He said oh, the shocks are at least half worn out and it would be a good idea. I told him that the car tracked perfectly straight so why the alignment? If the shocks are half worn out, then why not rebuild my motor too, since it also is half worn out? Obviously I am not the ideal customer.
My old 66 F250 had a very worn motor, the oil pressure would drop enough that when hot, the oil pressure warning light would come on. I put a new oil pump in it and used 40 weight oil and this cured the problem, sort of. It would use a quart of oil every fifty miles. It didn't leak and it didn't even seem to smoke except on hard acceleration. I drove it on a 250 mile round trip to Santa Rosa to pick up a replacement motor and used five quarts of oil.That was the single longest trip I made. Still I put at least six or seven thousand miles on it driving it to the dump and to work. I fixed the brakes, and the tranny was fine. I replaced the turn signal switch and had it painted. I kept that truck for three years before I sold it to a buddy of mine with the replacement motor in the bed. Now I knew that if I put the boots to that motor with a heavy load and high speeds there was a good chance that I would blow that motor, so I kept it down to 55-60 mph. So if your car has good oil pressure,idles pretty smoothly ( indicating fairly good compression) doesn't smoke, under normal driving, make knocking or clanking sounds or overheat than I would consider driving it to a car show several hundred miles away. (As long as the brakes, tires and chassis are in similar condition).