I don't know if you guys are still looking at this stuff but if you are here are a couple more interesting W2 intakes. The first picture has a painted manifold (Ed RPM) and LD340 the second has the two M1 W2 s and LD340.
A lttle over $2000....all hemi internals that were shot peened and cryogenic treatment upgraded interlock setup and they added an A body aluminum tail stock.
I don't know about the Holley system but I have the Fi Tech and it works very well they are self learning but ne prepared to do a little tweeking and also the throttle body looks alot like an old Carter carb.
I realize this post is almost a year old but for those that may read this to get some information on oil pans you might want to consider getting a pan from Kevco. they make beautiful pans that aren't too expensive mine holds an extra quart and does not come below the K frame.
I'd really like to see that comparison.....especially before I spend a bunch of money welding and grinding a perfectly good LD340 to fit my W2's. I did track down a M1 W2 dual plane but since my W's have rectangular ports I would have to weld and grind it too so I guess I will sacrifice the LD340.
I finally finished the '70 Swinger a few months ago so here is a couple of pictures of the engine compartment....I was able to get the stock rocker covers to clear the roller rocker without a spacer.