340 manifold vs TTI's which set-up?

Hey guys,
As some of you might know I picked up a set of 340 manifols Friday.Well Sat at the Spring Fling I picked up a set of TTI's.

After I bought them I was talking to a guy who had a hopped 65 Valiant with a 318.Seemed like he knew what he was talking about.He told me that I would be better off with the 340 manifolds on my basically stock 318 with electronic ign and a 4bbl.He said I would lose some bottom end with the TTI's.

What do you guys think.
Anybody running TTI's on there stock 318?

I will be leaving the 318 in for a while so what set-up do I go with?

Thanks
John