According to the
Alabama DMV, vehicles older than '75 don't require titles -- so you're set! They'll also do a VIN check for you to see if the vehicle is stolen, has a lien (which is doubtful) or whatever.
And if you ever move to a state that DOES title older vehicles, just about all of them (Maryland does, anyway) recognize that some states don't title older vehicles and they'll just have you do a paperwork drill to get a title.
So, lucky for you that you live in the Great State of Alabamy where titles are for the little people! Actually, Peggy will be glad another Alabamian has come to the site (She claims Warrior/Gardindale as home)
As to which truck ... Are you street rodding, staying original or something inbetween? I guess it only really matters if you are going to restore the truck to stay original. The 5-window cabs seem to be the popular ones and my personal preference is for the '49 (

see my signature line ...) So I'd go with the more complete one that will have better resale value down the road. If you're going to customize/streetrod or otherwise modify the truck, than it doesn't really matter and you can use the pieces you like best.
Hope this helps -- and Welcome to the 'Bolt -- we hope you like it here!
Regards,
John