I think that with just a few exceptions that everyone is pretty much running the OEM intake manifolds. Tom has been working on a sheet metal one - still a prototype I think, and he has modified some FR manifolds to fit. I think a couple have built there own custom jobs - I think John (Fastrax) did one. But other than that .... ?
Don't know if they are considered "best", but Eagle rods seem to be pretty popular.
Fuel management? The norm now seems to be bigger injectors with a MAF calibrated for them and either a Fordchip, Lidio chip, or Tom/Chip Guy chip.
Also, bigger injectors with a standalone are popular. Quite a few now have Pectel and I think there is at least one Haltec out there.
There are some running a 5th fuel injector setup too, it is called "SFMS" by its manufacturer.