I also have a 71 JH car and I recently switched my insurance to Hagerty, while my car is under construction. I gave them my VIN but asked what are the stipulations for its value if you go beyond stock. Restomod, clone, etc. He asked me what engine I had (440) and I said I do have some R/T parts in my car but it will be a full rotisserie job as well, and while I don't expect to get original R/T 440 prices, I would like my car valued above the 383 2bbl (L code) that it is. I said in the long run I'd like my car insured for 40k (Give or take), once its complete. He said that shouldn't be a problem, but a picture will be required once complete. Until then he asked me what he thinks my car is valued at currently (it's a shell in final stages of body work) in which I said I feel it is currently worth 15k-20k. He thought that was fair and put down 20k for the car and another 15k in parts I have laying around.
So while that's an insurance point of view and not a consumer price, It's nice to know companies like Hagerty will work with you. As far as consumer prices I think a clone like a 440 4bbl hard top should be about 60-75% of the value of a original. However, that would depend to me on how rare the original really is. For example if you were to clone a convertible 71 4spd 426 Hemi Cuda, I wouldn't expect millions of dollars or even 60% at that point, just for the simple fact that I believe it takes away too much from the rare original ones. So as far as what a clone is worth, I think it really just depends on what it is you cloned, and how well the job was done. After all the point of a clone is that you can drive it and have fun w/o as much worry of damage to an original and expensive car.
In the end R/T or not (Cuda or Barracuda) it really just depends on what someone is willing to pay for it. You could get R/T money from a non R/T if someone is willing to pay it! You just gotta find the right buyer.
My 2 cents for what its worth
