The Ingram shouldn't be too hard to bash... depending on which one. I've seen several over they years, some with thinner Excelsior nacelles and some with more TMP Connie nacelles (which look out of scale).
Here's a quick and dirty mockup I did in Milkshape. To do the job right would require a more time and some custom parts, I think (Esp. the aft end and the impulse deck).
BTW... not sure whos Excelsior this was... no readme.
-DT