What to tell the exhaust shop.

So my plan to run 2 inch pipes for the wye does make sense when it comes to performance. I think I will go with my original plan. From everything I have read Slants perform best with a single exhaust. So, I think this is how I will hace it done 2 inches for the WYE then increase to 2.5 all the way to the back. I am considering a Flowmaster 40 muffler. What other mufflers should I take into consideration, Thrush, Cherry bomb, Walker? The car is for street use so I do not want to wake up the dead.

I think that's a fair assessment. Inline engines.....and small cube V8s in general do tend to like a well thought out single exhaust as far as torque goes. At least that's what real world testing shows and not some online chart B.S.