Interesting car. By the VIN it's originally a 6 cylinder car.
I would say it's worth 10-12K depending on what's included and missing.
I would suggest you join the Trifive.com forum and list it for sale in the classifieds.
To give you an idea of value....
I bought this 2 years ago for 22K, 40 year old paint, 4 speed, '57 283 not running, with an old interior but not installed.
California car, 98% rust free, perfect floors.