TTI Headers

My TTI's are for an E body with W2 heads.
My 416 has W2 heads, I'm debating to going to aluminum heads?
Then I could use Dougs or Schmachers.
If so, I'm selling the W2's with the TTI's. I'm undecided at this point right now.
Have to pull motor apart next month at my buddies shop to see if they have had any port work done?
The passenger side is the same for all small blocks in A,B or E body.
TTI claims the drivers side slip header is what I need for my 71 scamp.