Is it rust free? I saw that you rebuilt the motor and it looked nice. I also saw that you have all the original interior which is worth alot. If it is really original and runs good with no rust I would say....probably somewhere around $9000 or so. It is really hard to guess prices on these things without physically looking at them.
I paid $5000 for my CST 70 and it was rusted out in the floorboards, needed minor body work, but had all orig int and brand new GM 4 bolt and new tranny. Just my .02

Good luck to you!
Diane