I currently have an F engine in my FJ40. I plan on replacing it with a 2F. Is their any difference on the frames where these motors bolt in? Basically, am I going to have to do any modifications to get the 2F in place or will it simply bolt in? Secondly, I have located a 2F engine, but it is in a 1983 FJ60. Is this the same motor thats in the FJ40? I've been told the block is bigger in the FJ60s. Is this true? Can anyone shed any light on this engine swap?