Re: 351W rebuild sudgestions
Several manufacturers will provide good cams for off-road use. I'd say find something with an idle-5000ish powerband and you'll be okay.
Stock heads aren't worth the work. Slap on some AFRs (best bang for the buck) with 58cc combustion chambers (be sure the head bolt holes are 1/2", as the 58cc are usually for 302s, which have 3/8" bolts) and that'll significantly raise the compression.
Get a dual-plane intake manifold, for lower torque (I've read lots of great things about the Stealth manifold from Weiand) curves and slap on an Edelbrock 650cfm- they're maintenance-free (worth every penny). A 750cfm carb is WAY too much carb- you won't get enough of a power difference over a 650 to be worth the gas you'll be wasting. MAYBE use a 700, but I'd stick with the 650. I'd also say manual choke- if you're off-roading like I do, water will be EVERYWHERE and can possibly short out your choke.
Just my opinion.