XxScottxXN

I just bought a 66 Caprice 427 and need as much info as possible on this car please? It is numbers matching. Climatron A.C., TH400, Tilt/tales, buckets with headrest, elec windows, elec antenna. The appraiser told me that it's the 425hp car because of the cowl tag saying Detroit. IJ engine code says 390hp?? How rare is my car? And possible value? Paint is only thing it needs and that's getting done in next few weeks