Need some info on Weiand S.S. Six Pack intake



Does anyone have any information, other than the common victory link on this intake manifold. I understand it was only offered in late 1969 through 1970 through the D.C. Manual, and was built solely to outperform the Street Tunnel Ram by Edelbrock in the Super Stock Series. I picked this up at a Swap Meet for a great price (with VERY limited information) and it is near mint, and still has the original rubber gasket; the owner installed the intake but never ran it on the car (sat in a garage for forty years!). I have an original D.C. Engine Manual but it has limited info on anything other than general porting tech. Any idea on the listed RPM range, and retail value of this piece? Anyone have any info or idea where I could purchase any additional tops (4 barrel or dual quad?). Thanks for ANY and ALL input.-Korey