It's hit or miss depending on how the angle is when you install it. I installed my powerhouse and J&M UCA but didn't make any adjustments, yet. I have taken it to 120 and no vibrations but when I get the chance I'm still going to check the pinion angle.
So, it's a good idea to at least check to make sure it's within spec since the 1-piece shafts are less forgiving than the stock 2-piece.