Cam grind, rockers and extractors for 302?

[mcfly94]

Hey guys over xmas i plan to upgrade the cam, extractors and diff in the LTD.

Looking at advice on best way to go.
Atm im thinking going with a stock low km lsd with 3.9 gears as i dont think im going to power levels that will require a locker or true trac centre.

Headers im a bit lost as there a so many options!
First should i go tuned or tri-y. Given this will always be streeted and 6000rpm probably going to be the limit of this thing, and i am chasing a quick off line car.

Cats im looking at magnaflow 2.5 100 cells as ive just done a straight through mandrel twin 2.5 system.

And now cam ive looked at much info pointing out comp cams xe270 and xe276, but i jumped on lunati's website and found something slightly bigger id like to run, dont know if this possible.
(End plans being 347 stroker and alloy heads)
10310302LK
Specs are
Advertised Duration (Int/Exh): 285/285
Duration @ .050 (Int/Exh): 235/235
Gross Valve Lift (Int/Exh): .540/.540
LSA/ICL: 108/104
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6000

Where i get lost is whats my limits on lift (PTV), what rockers do i go with (ratio, size, adjustable etcc?), how to measure what size push rods ill need.

Thanks in advance for help guys!