pete jackson gear drive
The only thing bad about a gear drive, it creates unwanted valvetrain harmonics that can cause bolts to back out, and valvetrain wear (worst case-scenario, though). Especially if it is a noisy one, the quiet ones don't cause as much, but still do. I thought about one for my 357C build, but I searched the internet for oninions and possible problems, and I finally decided to go with a double roller.
Hope this helps, Chris.
'73 Montego MX 357C Homebuilt EFI, 9.5:1 comp, mild cam, 30lb injectors, A9L computer, Moates.net chip, 70mm TB, 76mm C&L mass air.