440 rebuild ali heads? how far

hello, i have a 440 low comp slug in my 68 barracuda 4 speeed, its a street car built with fat torsion bars and ideally circuit designated.............i will be getting my tired lump overhauled in next few months heres waht my man said when i mentioned my budget, these are pounds not dollars so you can double it:happy4:, he also does all his own machine work and is very highly regarded here in uk........1500 will get a full rebuild of your motor.

New pistons/rings, either KB Hypers or Forged?
New cam and lifters.
New crank/cam bearings.
New adjustable-rockers/shafts/pushrods.
New larger Stainless valves/springs to match the cam.
New HV-oilpump/driveshaft.
Change from stock rods to Six-pack H/D type.
Re-balance crankshaft for rod pston cahange.
Block may need a re-bore and decking?
Crank may need a re-grind?
Heads will need porting and bronze guides fitted.
Hardened valve seats may need fitting for high mileage use?

Might be some Ali heads up for grabs soon?
Ported Edelbrocks capable of 600hp.

to which my next question is this, eddys save me valuble lbs in my quest to lose front end weight but could they be overkill on a street car also i am running the shumaker headers as i have no intention of chopping the fenderwell, will these restrict the flow if went ally heads and what is 500hp plus like as a road car? many mmany thanks,nathan.