360 rebuild, some questions/infos

Why the Street Dominator and Holley 1850? A performer RPM and 3310 would be better suited to a mild 360. The Street Dominator is a single plane intake and will give up some low RPM response compared to a dual plane. So unless you already have one, or have a severe traction problem, you may wish to reconsider. And while an 1850 is a fine carb, its really only going to support 275-300 horsepower even with the SD's open plenum.

Piston wise, the KB's will go a long way towards boosting compression without excessive machine work. Plan on having the bores redone as well as having the crank resurfaced. Balancing the rotating assembly is money well spent.

Here is merely a suggestion:

KB107 pistons .030 over (you really should redo the bores)
Moly rings (note the KB specs a larger top ring gap due to high placement)
Crank resurfaced .010/.010
Balanced (if you even THINK you may ever take the car to a track invest in an SFI approved flexplate and damper and have them balanced as well, torque converter too).
Stock rods resized with ARP bolts.
ARP main cap bolts
New stock volume oil pump
New double roller timing chain
Comp XE268 K-Kit
Stock heads with Ferrea stainless 2.02/1.60 valves (generally found on eBay for decent price), new guides and a good multiangle valve job.
New HD stamped rockers, new HD retainers, and pusrods as needed.
Performer PRM (non-airgap) intake.
Edelbrock 1407 (or Holley 3310) carb
Decent ignigition system (decent doesn't always mean expensive)
Torque converter with 2400-2800 RPM stall speed
TransGo TF2 shift kit
Headers and dual exhaust.

Something along these lines will be reliable, run on pump mid-grade, have decent street manners, and make a Dart scoot for well under $5000 USD. Given your taller gearing, you may wish to consider a slightly milder cam/converter. OR just learn how to walk it out of the hole and add 3.55's and a SureGrip down the road.

I'm sure the Magnum/Eddy head camp will weigh in, and it is well worth your while to consider this option. There is something to be said for all-new, high flow parts out of the box.