Van,
If your only looking for 100hp you have options.
1) a good ported Alum head, cam and intake/carb swap
2) A little squirt of nitrous
3) 5-7 lbs of boost
But...as it has been said earlier, torque rules and big blocks are king. I often hear the "small blocks handle better" mantra being chanted. The difference on an alum headed BB VS SB is 120-150lbs Truth is, on street car you won’t feel the weight.
However, you will feel the torque at every stoplight, freeway entrance or any time you let the clutch out and press the loud pedal. A 500ftlb/500hp BB doesn’t require any trickery and will make that power on cheap gas.
Basically, Big blocks are BETTER (
)and all of the small blocks guys are just jealous.
D-cel