Was investigating buying a turn-key motor from Carolina Machine Engines. I'm sure there are hundreds of pluses and minuses, but anyone have advice on which engine to go with for a street cruiser with a bit more power than pure stock?

Will be in a 1970 Challenger convertible

Comments on:
- fuel consumption between the 440 and 522?
- worth the extra money for the 522 stroker - really an improvement on torque?
- enough vacuum for brake booster?
- Would you run stock exhaust, or must run headers to get the power increase? What tube size?
- Other suggestions?

Thanks