I bought this boat 3 years ago, 272 Formula. In the mid 90's the origional owner repowered it with 454's, Weiand blowers and installed the MSD equipment at that time. Unfortunatley I didn't get much time with the total package. Several hours of run time I experienced a cracked block. Pulled the engines, repowered the boat without the blowers and MSD stuff. I have been running it stock ever since. I never played with the timing adjusters, everything worked fine. These are just sitting in my house, figure I might as well try to sell it.