I have a 3.4 pulley in front and the stock ones in the back I changed only cuz my friend bought a used maggie and thy were changed..the stock rear pulleys are a 3.25 I think there one size smaller like maybe a 3.0

 

Ok so you are barely working that blower, I don't foresee the spacer doing much for you. If your running a 1-1 rear ratio and a 3.4" front that thing isn't even breaking a sweat.

 

So what does that mean.it has almost 10psi..boost it more or what.do guys turn them 13 14 psi..that dont mean I need to use it often.i barely drive my truck once a week ..not worried about tranny if it blows it blows but the tranny hits shifts awesome knock on wood..whats ur number again like to talk to u if u dont mind thanks I appreciate ur thoughts imput.

 

Any time u can remove heat from the equation from any PD style Blower, hp is readily available. the spacer has always proven to reduce heat soak, in turn reducing your IAT's allowing for more timing to stay in. look at some of those IAT correction tables when those IAT's are up near the ozone without one...

 

i have one on the truck and it works nice seeing u here again ray