70 Chevelle LS-6 Exhaust Manifolds
 

(SOLD) a nice set of AZ take offs that just came out of long term storage. The casting number 3916178 dated C2370 and 3909879 dated D370. They both still have the original studs in them. There are no cracks or broken ears. Price is paypal ff shipped Fed Ex ground lower 48 USA. Larry 520-349-2337

Larry those are for a 396 L34 350 HP or 454 LS5 360 HP or even LS3 402 330 HP.
You would have to drill holes in the top for the smog tubes on LS6 and then thread them.