350 to 400 TBI

[F-ingrob]

im thinking of building a mild small block 400 for my 87 K5
has anyone done that and how will the TBI computer handle it
i know i will have to get the computer redone and im going to use Harris Performance
i was going to build a 350 with vortec heads but now my engine builder said he can build me a 400
any info would be a great help
thanks

 

[ryoken]

what cam you run is the critical factor...

 

[F-ingrob]

im going to be using one of the cams Harris Performance recommends on their web sight

 

[y5mgisi]

Should be ok. You will probably just need to do the usual mods. As far as upping the fuel pressure, etc. The Chip will be the biggest factor.