Whoa there fella , we need more info

Ok I'm assuming this truck is a bone stock blown Gibbs truck. ?

Before you go puting a smaller pulley on you need to make sure your fuel system ( injectors / pump) are up to the task . I'm not sure what injectors are on your truck , prob. 42# but I'm not sure.

Your gonna need retuned for the added boost and you'll want to monitor AFR and fuel psi as well .

Many many stock long blocks can handle up to 20+ psi boost. , when fuel and tune are right on , so you can throw the smallest pulley on that 112 they make and be fine as long as above requirements are met

In the world of forced induction , a boost gauge , wideband AFR gauge and fuel psi gauge are mandatory.

Btw I ran 12 psi on my setup without meth , but I wouldn't go more than that .

 

U take it easy! Lol.
I realize how addictive thus is! I'm not looking to go crazy for now ! Umm fuel system is stock! I just wanna go with a smaller pulley and a tune from a local tuner! Ill need to pick up a fuel pressure gauge I guess!

 

In the future I want some lt headers posi boost cam meth and upgraded fuel system! That'll b awhile for now!

 

I'm willing to bet the Gibbs truck has the fuel pump that the Radix kit came with. Truth be told I don't remember what that was... I know it was smaller than a 255 though.

A 255 and 60# injectors will go a long way with this build though.

 

Believe the Radix came with a 190lph

 

Yup that sounds right. That fuel pump will give you a little room to grow, but nothing too major.

 

Why only 90 octane gas? Texas is flush with 93 even in the smallest of towns.

 

wrong. not in this lil town! even in lubbock its hard to find!