Frontrunner Alternator Question

[g-lee10]

I have heard rumors that the "Tuff Stuff" alternator that is included in the Vintage Air Frontrunner Kit has proven to be not very reliable. Anyone with first hand experience and or comments? If it is true, has any one found a more reliable alternative/replacement to the Tuff Stuff alternator that is compatible with the Frontrunner Kit?

I'm about to purchase a BBC Frontrunner and want to know what I'm getting into before I drop $2K. Any info is much appreciated.

Overall thoughts on the Frontrunner?

Thanks,
Gary