Blower, NOS, or Bore increasment?

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70 Formula 400

Junior Member
The block is a 400CI Pontiac.

I heard I can bore it to 421,455,462,and 468. What is the best one for a dainly driver? if I do decide to do it.

Also NOS, what is the basic info I need to know when getting NOS?

Or should I ditch both the ideas, get a new hood, and purchase a Super Charger?
 
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