Here's my 2cents after having installed one on my 340 stroker motor in the 73 Cuda:
1) Had a small oozing leak from one of the welds which would leave a quarter-sized stain on the garage floor. Of course, it didn't leak on the dyno. It had to leak after I put the motor back into the car. Since I didn't want to pull the motor again, I cleaned the weld and put some JB Weld on it. So far so good, but it shouldn't have leaked in the first place.
2) I spent quite a bit of time adjusting the built-in crank scraper hoping for a few more HP because of less windage. Guess what, didn't find any extra power on the dyno.
3) The drainplug on the Kevko pan is on the left-hand side towards the front of the pan. I think it was put there because of the trap doors in the pan (keeps the oil in the sump under acceleration). Unfortunately, that also means you have to jack up the whole car to drain the oil. You can't just jack up the front of the car. Some of the oil is trapped in the sump.
4) You have to recalibrate your stock dipstick because of the extra pan capacity.
Looking back, I probably should have just welded some baffles in my stock pan.