I have the canton pan, front sump, and have not had issues thus far, street or on the track. I actually paid attention to this when I was at Putnam in April and saw no fluctuations in the pressure. I have this pan -
http://www.cantonracingproducts.com/...ion&key=15-764 and the 15-763 pickup on my 460.
Here is how I received it:
Here is a picture of the baffle before modification:
And after:
I did the modification to clear the pickup assembly as I put the pan on with the engine in the car. I liked this pan due to low ground clearance and having the trap doors and baffling. And before the argument starts on front sump vs. rear sump - I have experienced no issues on road courses nor drag strip, it works for me and my car.
HTH,
Tim