So many questions...are there any answers?

[Tork?]

Also when swapping to car intake try to find one as complete as possible bc all the little things will nickel and dime you... Injectors, fuel rail, tb, map sensor, etc.

And if you want LS3 intake like has been said you'll need cathedral to square port adapters, and for a few hundred more than adapters you can pick up some used LS3/l92 heads which are some of the best factory GM heads. Plus ls3 is dbw so if your harness is dbc that's another cost. Otherwise, ls6 is best factory intake worth ~10hp over LS1 intake. There isn't much power to gain moving truck to ls1 intake and I think truck is known to make more tq. Regardless car intake with ls3 wp is definitely a much cleaner look up top and with radiator hose routing!