I have seen this vehicle as I was interested in buying the car until I discovered that it had a restamped block and many other problems. It was for sale on the Vancouver BC and Seattle WA Craigslist for a while but was such a disaster that it became unsellable locally. Here is the link to the ebay ad which, unfortunately is the usual dumping ground for such vehicle.
https://www.ebay.com/itm/1969-Chevrolet-Z28/264244162647?hash=item3d862df057:g:kGEAAOSwR2Zcjx~P
Link is listed as an "Error Page" for me.
I am happy to say that after complaining to ebay they kicked off the ad.
Do you have the complete VIN for the record?