Spring Recommentation?

I am doing a budget build on a 318. 74 dart sport (You know, a politically correct Demon), aprox. 2500-2800 stall converter. Roller LA 318. 904 with 999 gears. Dual plane intake with 600 holley vac. sec. 302 casting heads. 3.23 rear gears in an 8.25. Gonna start out with stock valves in the heads till funds allow, then maybe pull the heads and put some 1.88/1.60 valves in later. Not too sure about the valve upgrade though.

Anyway I want to use this regrind from oregon camshaft:

Grind number 1331 (from their HYD ROLLER CAM SPECS).
Duration at .050 232/240
Duration at .006 281/289
Lobe Seperation angle 112
Lobe Center 108/116
Lobe Lift 350/355
Valve lift (ratio, Int./Exh.) 1.5, 525/533
1.6, 560/568
1.7 595/604
1.73 606/614
1.75 613/621

Gonna use the stocker valve train. So I suppose the rocker ratio will be at 1.5.

Can somebody help me with a spring that would work out with these heads and camshaft? Its gonna be a street engine with a redline around 6500. This motor is just something to get the car on the road, I just dont want to put very much money in a 318. I do have a drill press, and if I remember correctly I can get a valve seal boss cutting tool that I can cut the valve guides down to increase the clearance there if necessary. However, right now a drop in spring would be the best. Also, I am sure I have a set of standard type valve retainers somewhere, I believe these heads have the rotator type retainers on the stock valve spring setup.

Any help would be great.

Oh yea, and costs isnt something that I want to skimp out on with the valve springs. I hate seeing hot cams with stock springs.

Thanks for any help.