340 vs. 360 build?

360 bored 030, decked for zero deck height, Diamond forged flat top pistons, SIR rods, Edelbrock LA style heads 63cc to give .040 quench with .040" Cometic hd gasket, 1.6/1.5 RR assembly and moly pushrods, Racer Brown or Bullet hydraulic cam in the 240-244*@.050 w/ ±.520 lift and springs to match, Eddy Airgap intake, 650 Mighty Demon carb., 3500 stall TC (no cheapy), 3.91 gears and a good set of headers like TTis will give you a great street/strip combo and run mid - low 12s in an A-body with a reasonable suspension setup.
Now go have some fun.

Save the 340 for the resto guys.