I have been kicking around the idea of converting my Road Runner to a A12 clone. It' a nom driver. I figure 3-4k in parts/motor to do the conversion. Would that increase the value of the car as a clone?
Concerning the cost/value, a clone will never be worth anymore than the sum total of the parts. Why? Because anyone can duplicate what you plan to do whereas with a "real" A12 there are only so many of them. That and the condition of each individual one will determine "their" value.
That being said Your car will always maintain the value IT has as a 383 RR as long as you keep all of the parts to convert it back. After all, what you are doing is the same thing the factory did as they started out with a 383 RR to build an A12 RR.
The cost will vary to do the conversion depending on what you have, what you have to buy, and how truley accurate you want to be. If your car happens to be a 4 speed it would be recommended that you install a Hemi box as the factory thought it was important and that would be a good lead to follow. If your car is an auto then you can stay with the standard 727 as that was also what the factory did. many 383 RRs have already been upgraded to a 440 and if this is the case with your car your 1/2 way to the conversion.
If it were me I would buy "look alike" 15" steel wheels rather than original A12 wheels which are expensive. That is unless you don't like that part of the A12then use the wheels of your choice as most A12 owners did "day two." You can buy the wheels, intake, carbs, linkage, hood, decals, and air cleaner repro. The main thing is that I would want it to appear as original to a casual glance as you are not going to fool a knowledgable looker for very long anyway. No one can read the V.I.N. when it is driving by or blowing their doors off anyway.
Parts needed:
440 Engine
Wheels?
4 speed?
Auto--higher stall converter
intake
carbs
linkage
air cleaner
hood
decals
suspension?--The first several A12 cars had the standard S13 Rallye suspension but MOST of the cars had the S15 Hemi suspension. If you want to upgrade the suspension you will have to change the rear springs and torsion bars.
These are really the only things that are different between a 383 and a 440-6 Barrel RR.