Would a 106mm single work good or would I have more fun with a couple of 88mm's? It is a bigblock dually.

 

is this a 8.1L or a 99-older model truck

if its a 8.1L your motor stock cant handle the boost ... you'll blow a few pistons ask tierod

now i dont know about the 454s

a 106 mm is going to have a considerable amount of lag i would think twin 88s would be better

 

Fully forged,dart 345cc iron heads, just don't want to detonate when pulling my race car up mountians in 110 F heat with the ac on. Running flat out unloaded with the boost turned up is the easy part.

 

id go with twins they have less lag and the same high end power

 

I think a single 88 mm will bbe just fine. You pick the turbo based on the power level, not the displacement. Pick the turbine side based on displacement. A T06 flange T88 can make enough power to smoke your driveline.