sorry for the confusion on the ls1 i just have always considered these ls1 based engines and referred to the steel blocks as ls1 but yal are right on the 5.7's.
the problem is finding the coupling to go from ls2 to omc cobra. if you could see the pic it would help. i have to have engine forward by 1.5 inches so the coupling will clear the transom plate because my adapter makes my coupling sit that 1.5 inches more to the rear than it sat in there stock. the coupling should now be sitting in the exact same spot that it was in with the stock motor. I have no doubt that my work will be reliable, safe, and hold up as far as my adapters and mounting points are concerned i just need to know if it is ok for my motor to lean down in front a bit if my alignment shaft goes in and out correctly. i might try to take next week to a marine shop to see what they think. one tech told me front of motor does not matter and another tech told me the back may need to come up a little then i would be able to tilt front of engine up some. been real busy here at my shop so i have not had time to try anything lately. soon as i figure this pic thing out we can all look together.