Exhaust manifold to air cleaner heat riser tube
 

Im rebuilding the quadrajet on my 70 Formula 400, & would like to get the original air cleaner back on it & get everything back to original. My question is, What color did the heat riser tube come, originally? I need to purchase one, & Ive seen them in black & silver.

black for a '70

the silver ones came on the later cars

OK. Thank you. Thank you.