Re: 351W-HO Which Intake?
Which of the Edelbrock intakes largly depends on where you want the power to come in at on the RPM band. Most truck engines want low end torque. Power from idle to about 5000 RPM. The Performer manifold is designed for this power range. The Performer RPM and Victor Jr. are for power bands that start at around 2000 and go clear to 7000 RPM. Most stock/mild built engines won't see that high. They will float a valve first. I feel you will get the most bang for your buck by getting the Performer manifold. It is a dual plenum with long skinny runners best suited for lower RPM power.
Remember that cams have a working range as well and that needs to be matched with the manifold. If you get a low range manifold and a hi range cam. Your manifold will be past its power point before the cam starts to work. With the Performer manifold, I would choose the Edelbrock cam part number EDL-2182. This cam is rated at 204 degrees duration @ .050" lift and has an intake lift of .448" .472" on the exhaust. This cam and manifold are matched together by Edelbrock to get the most power in this RPM band.
Good luck, Eric