4500 Dominator Question List # 4575

[vagtlmn]

I have a Dominator that is List # 4575 and I had it totaly redone by Holley a couple of years ago. It has built in stacks and I am wondering what they were originally used on and are they worth anything if I wanted to sell it ? I was told by someone that they were used on early NASCAR Dodges ????
Thanks in advance for any info you can provide.
Steve