What to tell the exhaust shop.

RustyRatRod said
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.

My point above was that two inch pipes coming off the headers would not be a flow restriction into the single 2.5 inch main pipe.