Its not easy. Lots of rusty bolts which will twist off then you have to use easy outs etc with no room to work. I've done two, one in the boat ( a 351 ford) and one with the engine and outdrive out (a 350 chevy) but it was still a lot of knuckle busting work and if you dont have the gaskets just right you have a water leak like I did and get to do it all over . I would never do it again but thats just me.. Frank