350 cam selection

ok i have an '80 chevy 3/4 ton shortbed with 6" lift 35" gumbo mudders
with 4.11 gears/ 4speed sm465 tranny...i have a 350 with stock
internals,vette heads,edelbrock performer manifold,edelbrock 650
carb,headers,3" back to flowmaster single chambers or 40 series(i have
a set of both and im going to use what ever works best).i would like a
lumpy cam but i need as much power as i can get for when im in the mud
and all....i was looking at the comp-xtreme 4x4 -12-239-3 has anybody
had any experience with this one???i did some figuring and i came up
with some numbers for a cam that might be decent for what i want here
they are any let me know what y'all think about them... @[EMAIL PROTECTED]
 218/226
..462/.480 Lift
108 LOBE SEP??
how does that sound???and where would i get one of that grind???thanks
alot and please let me know...thanks