I don't think the LSX will out power the DP intake, but I think it would be a good street manifold, I also think that it would be better as a carburetor setup as opposed to EFI because the adapter would place the injectors about an inch higher than stock. The ports are closer to pre Eagle then 6.1\6.4,5.7 Eagles, my thinking is that it would flow enough for the Per Eagle, but starve the "squarer" port heads above 6500
I did a 392 build for a guy here in Philly who is using an edelbrock 7141 crossram on 03 heads, 3500 to 6000 car feels like you hit a 150 shot of Nos
How did the P7 work out?