Ok, I started looking to see what is avaliable and affordable. Here is what I came up with to build a decent street performance 383, that should make around 450 HP, and cost around $3,500.
The $3,500 does not include oil pan and pickup, Carb, ignition system, exhaust system, or cooling system.

So here is what I came up with (copyed and pasted from my spread sheet):

383 PARTS LIST
PART DESCRIPTION COST Notes:
Pistons KB-400-030 $345.99 9.5:1 to 9.8:1 Domed piston using 80-84cc head, 0.040” Gasket, 0.024” below deck.
Cam Kit Lunati 60303LK $209.95 Cam and Lifters, 3-bolt cam
Gasket Kit Fel-Pro QKS2110 $55.95
Rod Bolts ARP 145-6002 $61.31
Piston Rings Sealed Power ZE233K30 $48.95 Moly top ring, not file fit, mild performance app?
Main Bearings Clevite MS876P $62.95 Performance Set – standard size
Rod Bearings Sealed Power Z82320CP $64.95 Performance T-77 Set of 8 – standard size
Cam Bearings Dura-Bond PDP-17 $24.88 Prefered performance cam bearing for best fit
Freeze Plugs Sealed Power Z3818011 $12.99 Brass freeze Plug Kit
Valley Tray gasket Fel-Pro (112-1002) $19.95 440-source price
Oil Pump Melling M-63HV (440 S Price) $65.95 High Volume Standard Pressure Oil Pump
Oil Pump Bolt Kit 440 Source 109-1502 $9.95 Longer bolts for HV pump
Oil Filter Fram HP-1 $9.95 Oil Filter
Timing Chain Set 440 Source 102-1004 $74.95 3-bolt timing set, double roller
Timing Chain bolt kit ARP (440 source 129-1007) $8.95
Harmonic balancer 440 Source  200-1083 $89.95 High Strength Steel, non-sfi
Cylinder Heads 440 Source 200-1055 $995.00
Cylinder Head Bolt Kit ARP (440 source 129-1005) $79.95 440 source brand 109-1514 = 44.95
Spark plugs NGK $24.95 440 source – Champion 3/4” reach 138-1000 = 24.95
Intermediate Shaft Bushing 440 source 101-1001 $7.95
ARP Main Stud Kit 440 Source 129-1008 $59.95
Intake Manifold Edelbrock Performer RPM $239.95 440 source price
Sub-Total $2,575.32


Machine Work
Clean / Hot Tank Block $50.00
R&R & Fit cam bearings $30.00
R&R Rod Bolts and recondition rods $100.00
Align Hone Mains with ARP studs (if needed) $100.00
Mill / square Deck $100.00
Bore & Hone cylinders /w Torque plates $160.00
R&R pistons (press fit pins) $24.00
Turn / Polish crank ( if needed) $100.00
balance engine $200.00
Sun-Total $864.00

Total = $3,439.32

Power estimate using headers, and 750 cfm carb:
RPM HP TQ
1000 59 308
1500 95 332
2000 130 341
2500 180 377
3000 234 410
3500 278 417
4000 327 429
4500 388 453
5000 433 454
5500 452 431
6000 454 397
6500 445 360
7000 420 315

As you can see, not much torque in the low end.
If the deck is milled about 0.020" the pistons should be at 0.004 below deck (not the dome part) and that would boost compression to 10.27:1 and add about 10 ft/lbs of torque to the power band (and also tighten up the quench, but the dome would have to be checked for clearance.)
These power numbers were estimated using low port flow numbers that someone reported as out of the box numbers. with some port cleanup and the milled block peak power could be around 475 HP.
Numbers were generated with the Dynomation 5 sim, wave-action model, and when I tested larger cams, they seemed to really hurt low end torque even more.