Aside from it being a l/c engine it will fit but its a bad idea and more hassle than its worth. Zip engines arent all that hard to find?
L/cs are a bit more powerful as stock i think...not 100% sure as to to what extent. Either way there shouldnt be all that much in it and they will both top out about the same But a runner engine will mean having to add a rad and stuff which doesn't always workout well on zips
A/c are quite alot slower than L/c. My nrg is ac an has a pipe, my mates nrg is lc an ha a pipe. He tops at about 58 an mine tops at 52-54(when it works haha)