I am having a problem with alpha one gen one trim pistons. I purchased used ones and my problem is that there is not enough travel from the piston to lower the drive to the proper position. The shaft needs to go into the housing about one and a half to two inches more to acheve the proper position. I went to a marine store today thinking the used ones may not be right and was ready to purchase new. I found the brand new ones had the same problem. They were longer. The drive is 1977 to 1982 app. If anyone could give me some insight on this it would be appreciated.