I have bone stock 330's with stock exhaust. If I were to run mag cams and 6 cyl thunderbolt modules would I gain anything worth the effort. I would like to keep the reliability of the old motors even though I'm the slowest on the site.

If your going to go through the effort,I'd do something better than factory mag cams. For factory cams you certainly don't need to bother with v-6 modules, your stock one is the same as the mag motor as far as I remember!