Hm. So you're saying it's for the smaller engines. Well, we'll see how my 360 runs with it. It was put there by a reputable engine builder here in Sweden who has since passed away so I can't ask him about it.
It's made (the LD4B) to work with the smaller port heads.
But that doesn't mean that it won't run good on the 360. There will be just a small port mis-match, but you can either accept that and run it as is, or you may have it ported to match the heads. A simple gasket match port job for the intake and heads will fix that issue if you are chasing every last HP...
It's just that it may not run as good as the LD340 with the better matched ports to your heads, but it is the next best thing and I would use it if you have it, it's a great intake, and we're only talking a few HP difference between the two.
Note also: the LD4B does not have mounting bosses for the ignition coil like the stock intake & LD340 have, and you will have to find a place to mount your coil.
I would run it, I think it will run very well with it. :cheers:
If you don't like it, you can always try something else later...