To answer your question, we first need to know which version '79 you have. If you have a 455 engine, and the trans direction is facing the opposite way, then most parts in the front end are from the Toro. This coach is really a '78, but was sold in '79
On the other hand, if you have a 454, and the trans is behind the engine in a conventional configuration, then you have the later version slant nose, and much of the front end is semi custom. Wear parts are still stock items, but you have to know what was used where.
Revcon did such a mix and match of suppliers trying to stay alive.
This statement could be misleading. Late 70s to early 80s were the "glory years" for Revcon. They made a ton of coaches during that time period and did very well. As far as understanding the mechanical engineering, in '76, Revcon hired an engineer by the name of Peter Bryant. Peter was very well known in Formula 1 racing. His claim to fame is the T22 that toppled the Lolas that dominated F1 during the late 60s. His purpose in redesigning the front end, was to properly handle the load requirement of the Revcon. Coaches were getting bigger and bigger, which required a much higher load rating. Any time a regular mechanic sees front end parts off a later model Revcon, you always get comments about the size and weight of the C-Vs, and front knuckles. The stuff is big and heavy.