Steve, how does an LD340 perform in comparison to these RPM manifolds? I was under the impression these were top of the line for all-around performance! here's a bump for ya:)
There are many differing opinions on that debate. My personal opinion is they are both great manifolds, but the performance differences between the two are negligable for a low rpm (below about 6000 rpm) street engine.
The reason I bought my LD340 after buying this RPM is because, to me, old school is way more sexy than the newer stuff.