reliable=approx 100whp over stock

you can get more, but you roll the dice past 200-210 on a stock internal sohc.

i'm pushing 250whp, pootr has 240+whp, another guy here (miro gt (i think that's his screen-name)) 230+whp. we're all willing to pop the motor and drop another in.

you'll have more versatility with a b-series, but also more $$ to begin with.