engine swap question

not sure if this is the right spot for this question but here it is. i recently pulled the slant 6 motor out of my 72 scamp and was looking to put in a 360 or bigger. i have tried many times to ask other scamp owners who did the same swap with no success. does there have to be many modifications to make this work. if i go with a 360 it should go, right. if i go bigger, do i need to move or cut anything to make it work. i have new k member set up and motor mounts and i understand i need a new trans. any help would be greatly appreciated. also has anyone heard of a chrysler 413 motor, there is a guy in my town selling one with trans for $100. he says it is a 63. thanks again
Angelo