I'm pretty sure that all the 1970 Shaker scoops were silver argent, maybe in late 1970 they started offering the black for 1971 car, maybe not
We bought a complete NOS Shaker set up from Dick Landy in early 1974 and it was siler argent: work:
He held onto it until NHRA made the 1970 T/A glass hoods with the T/A Scoops legal on 1971 Hemi Challengers in 1974