Why was the Boss 302 so mythical? Sure it was 290 HP rated but the 340 would do that too with more torque. Here is a pretty much stock 302 on the dyno. ~300/300 combo. Look at the HP under 3000 rpm.. here is a pretty basic 340: 73 block and main caps, 3418915 J heads, cast iron stock intake 2531915, factory forged crank, windage tray, 273 rods w/ floating pins, comp cam XE268H-10. On the Dyno it made 367hp at 5800 rpms and 375ft lbs of torque at 4100 rpms Nicks garage did one with a "simple voodoo cam and a high rise intake" and a valve job, got 369 HP and over 400 ft/lbs torque.