jhy

Hi. I did alot of researching but still cant find an answer. Opinions everywhere on this subject.
Are the gt2 cams or the 964 cams better for mid range for street car?

Engine is 3.4 EFI, 3.2 manifold, ported heads,headers, and k27 turbo(may update to gt35r in future)

2. Would the gt2 cams output more of a gas smell
even though i am efi?
3. I also noticed the cam grinders have different measuements for the gt2 profile/ which to choose?
4. Would the gt2 cam cause more stress on the springs/using stock springs?

I mainly want an efficient cam and engine reliabilty. It would be a daily driver.

thanks