Since you said Valiant, I'll assume it's a 4-door. Here's what I did with my DD 4-door Dart. It was a running POS when I got it. http://www.forabodiesonly.com/mopar/showthread.php?t=51094 shows the progress and discussion. Some of it has been easy for me, some of it tough. The nice things were the ability to go at my own pace and still not have the car down for long while doing it.
The hardest parts were re-skinning the roof and doing a BBP disk brake conversion. The wheels and tires were the most expensive part. Paint is a $500 MAACO one-step polyurethane matched to Mopar paint code. Paint was done a year before this photo was taken.
I also painted the grille (see avatar on left). That took two rattle cans (self-etching primer & semi-gloss black) and a partial roll of masking tape.