Yes, you can certainly do it under 10k. You are right that it's not a roller engine. It is also a 454, not a 502.
The blowers were a hit and miss. Some lasted forever, and others did not. The blower rebuild is just preventative maintenance. The best thing to do for the blower is to service it religiously.
If you are going to change the cam, then I would absolutely go with a hyd. roller. The flat tappets of today are having some issues. There are a bunch of cheap lifters from oversees combined with the lack of zinc in oil. Sure, you can use additives to replace the zinc, but why bother. Put in a hyd. roller and be done with it.
Give me a shout if I can help in any way.