Well I've never done it before but think about this, I think I might try it next time I do a swap. To get the Lt1, or ls1 doesn't matter out of a fourth gen the easiest thing to do is take it from the bottom. Disconect all the harnesses and hoses, driveshaft and torque arm and unbolt the K-member. Try putting it in like that. It can all go in at once.