Hot Rods HELP..getting old numbers to show up.

Ok need those old time tricks here..The #'s are all but gone on this manifold.
Tried the rubbing way but not coming up good enough to really read. Anyone have any old school tricks that would help?

 

Acid and heat is how they bring up block numbers on engines that have been decked.

 

and thats done how??????

 

a little muriatic acid and some heat should do it. dont leave the acid on too long though, and douse it with oil after. heat it up, brush on the acid, wait a minute, and clean it off, then oil it

 

Is that a Late Olds W-2 Factory Header ?

Sure looks like one...

 

Suppose to be for a 409 chevy

 

It's definitely a hipo 409 manifold.

 

OHHH Yes, Now i see it !!!

Very Nice !