will a x-cam fit with stock pistons and gt40 heads>?

[95conv5.0]

just like the tittle says!

 

[neil5.0]

NO

 

[maverick0716]

I'm guessing no......it's a big cam. Question, what is the rest of your combo like? I ask this because the X303 is a high rpm cam (6500 rpm) does the rest of your combo make power to that level? (I'm pretty sure that unported GT40P heads make power to around 5500 rpm.) If it doesn't then all you're going to do is lose torque down low and not use the cams potential up top.....so very small powerband.