I have a 1959 Apache. I am trying to figure out wich way to go. The 235 runs but it is low geared and gets about 12 mpg at 55.Do I rebuild and and high performance parts to the 235 or do I drop in a 350 w/ auto? If I stick with the 235 where can I get the parts? I would like this to be a daily driver when I am done!