From what I remember on the old SLP boards they were more problem than they were worth on the LS-1's. Usually providing no benefit. I think the stock ones on our cars are good for more air than the LS-6 can take in. YMMV
I put one on my V and after a few hundred miles it set off the check engine light. I removed it and exchanged it thinking that something was wrong with it but the second one did the same thing. I didn't notice any difference in power with it.
I know a guy who works for Granitelli.......he says not to waste your $ for the
MAF.......use it for the programable computer thing(sorry I dont know the correct techie info for it...) Good luck and Good hunting.