what about this one tubed 69 cuda ?

You're going to have to give a lot more info than that for an accurate estimate to be provided. For example: What rear axle to include ratio? What rear suspension? Does it have a cage and how many points? Do they know who did the cage and backhalfing? Has the chassis been certified previously? Is the interior aluminum work already done? Does it come with a title? Does it have a fuel system? Does it come with any other parts like exhaust? What kind of shape are the slicks in? What work still needs done to the body and flooring? Does it have any instrumentation? These are just a few items off the top of my head. Otherwise my answer would be, $2K-$8K.

What are your plans for the car, i.e., strip only, street/strip, etc...?