I'm half way done building my 408. I've got the whole short block done and I just need to get the TFS-R heads and Intake manifold, Kooks long tubes and the rest of the valve train. I need everyones help on which rocker arms to buy. I am very limited on cash so the scorpion 1.6 ones look real good right now for $200. Is there any difference between all of the different brands? If need be I will go all out and get the crane gold rockers if they are that much better but I have no idea. Thanks.