An LT engine would be very easy as it's block is basically the same dimensions as the standard smallblock, and there are kits to install the smallblock, very straightfoward. Now on the LS engine, that one might take a little more ingituity as it's probably not been done very many times. There are some folks I know that have an LS motor installed in a 67 camaro and another who is going to intall an LS in a 73. There are some kits available for the Gen 1 Camaros but not sure about the Gen 2. I would bet you could get an LS in an S10 but would take a little more work.