318 budget build
I think it will cost more than that.
I'll give you a run down of the absolute bare minimum you should expect to pay for stock replacement items.
Cam -$200
Lifters-$70
Valve springs $120
Break-in lube - $25
Gaskets -$60
Water pump - $60
Fuel pump - $40
Oil pump - $30
Freeze plugs - $20
spark plugs - $20
Plug wires - $40
Motor oil - $30
Air/fuel filters - $50
Hoses, Clamps, fasteners etc - $75 (it adds up fast)
I'm not sure if you're talking about doing rings and bearings (I would) but they cost more as well obviously.
I'm sure there's some things I'm probably forgetting.
All these prices are estimates not including postage/shipping. just be glad you don't have to import your moparts to Australia!
So far I'm not giving an estimate of any machine work or aftermarket performance parts and we're nearly at $1000.
Also don't expect to get away with just a surface grind for compression on those heads if you wanna run a cam with .520 lift. you will have to get the guides cut down for clearance.
Also that's a pretty stout cam and will be capable of some pretty high RPM. it would be highly recommended to balance the rotating assembly.
If it were cheap everyone would do it!