Looking into changing out the T38 that is on my cossie motor for a T4 Roller Bearing.

Now i have concerns about lag and the likes as i have never driven a car with one of these "modern day T4's" fitted

What they like?

Going to be on a Low Comp engine with Exh Cam, Siemens, MSD L8 etc etc.

Opinions please.

Cheers