Hi all.
Getting ready to rebuild a 400 sb to put in a Fiero (i know, i know.... but... it is a Chevy engine  LOL).
I pulled this 400 out of my truck to put a 454 in.
I have always been a believer in "bigger is better"... but.... this is the first time i've started to stray.  I've ridden in two Fieros with stock 350 crate engines.  VERY quick. I'm thinking that a 400 has more torque than i need/want, (never thought i'd ever hear myself think such blaspheme)... but... I'm thinking smaller crank from a 350 or 305 ??  go for rpm's and top end and blow off some of the bottom end... pick it up higher in range ?? Like a GIANT bore / short stroke 327 or something.  Any ideas ??
BTW... a small block with aluminum heads only weights 65 pounds more than the stock 2.8 v6... in a 2700 pound car... Perfect combo for passing tourist traffic in the mountains of Colorado.  Mmmm . ??
Any ideas ?
Kit "the Old Fart"  

hi

i think that instead of reducing displacement is better to use a longer rod ,let's say 5.7 or 6.0
that will make it rev'up a lot more happier.

89 chevy  

of course that comes with a properly matched set of pistons.

89 chevy  

longer rods make more torque so i advise against that.
what year is the 400 block(journal sizes)

just build the 400 mild not a street screamer. ypu could play with the torque with your cam.(intake/exhaust lobe seperation)the more seperation the more torque. There are many ways of manipulating hp and torque.  

a destroker kit check this out

http://www.speedomotive.com/ps-60-8-chevy-400-to-350-with-6250-long-rods-destroker-kit.aspx  

The problem i see with this is that to much torque will kill that original 5 speed even if its a getrag, if you check ebay on USED NASCAR PARTS you could manipulate putting a 327 crank in a 400 imagine that long as those carrilo rods and pistons would fit or go custom, cheap too