Just need to throw in my two cents on the Q-jet discussion. When they work, I love 'em. When they don't, they're about as difficult to tune as anything. They're pretty much meant to be tuned from the factory. If you go to the parts store and ask for one for a 4.3L v-6 (85-86 monte carlo) it will be 500 cfm, rather than 785 cfm, which is the next size up. The 4.3 is 262 cid, so it should pretty closely match the 283's needs
