Doug, Like Roger said on wheel tire combo's, hit as many shows as you can...with a tape measure and note pad. I have had very good luck with owners measuring there cars if asked before you do, most are willing to help and flattered you like the stance. Snap pics of what you like and don't like.
I am a huge early hemi fan, if they are selling a car learn the difference in the earlies if you are in the market, many 331 & 354's passed off as 392's, all are good motors but value wise a 392 is way more $$, so know what your buying and don't get swindled.
Your price seems fair even for a early hemi powered car, just make sure you test drive it, and the longer the better as there are many rods out there only suited for a short jog and not a healthy cruise. Since you are in Texas I would recommend driving it in stop & go traffic with the air on and watch the temp, probably one of the main problems to deal with as A's don't have large radiators. It surprises many rodders to find out that hemis tend to run cooler than sbc's, it simply the fact the blocks and heads hold way more water, a little over 4 gallons to be exact (if I remember right).
Also keep in mind what you term as a "rebuilt" motor no matter what power plant. My term is new everything including a bore and pistons, a lot of guys simply hone the cylinders with rings and bearings and the motor is passed off as "rebuilt" the difference is huge and many are going to say it was rebuilt so many miles ago, but what was done? Do a compression test and leakdown test or take it to someone who will. If I was in you situation I would be patient, the season is starting and prices tend to creep up, do your research and know when you find your car! good Luck matt