i have a built gsr block with je pistons and the head has stanless stell valves and i was wondering if i would be able too run a 75 shot of nx wright now i am running a 50 shot and it feels like ****. and i even have a walbro fuel pump with bigger injectors

 

There is a fella on here (fatkid) that ran a Zex 75 shot on his internally stock 99Si for about 2 years (I think he said about 40 bottles) without problems. So I would say yes, you can run a 75 shot on yours.

 

Since your motor is built up it should be able to handle 75hp.

 

your motor built seems about right, make sure your running colder sparks plugs to