Until NHRA made SFI dampers mandatory on 10 second and quicker cars many years ago, I always used factory FE balancers, and never had any issues. I have been running ATI Super Dampers on my drag race FEs for over 20 years, with no problems. As mentioned, the TDC mark is of 7-8 degrees, 2 minutes with a grinder cured that, and the 3 pulley bolt holes need to be slightly elongated, another 2 or 3 minutes with a round fie fixes that, as the register ''nub'' is the correct diameter. For my 331 SB Ford race engine, I have a SFI Powerbond, that is fine as well. but for a mild street FE, I see no need for anything more than a factory balancer. As long as the rubber is in good condition, and the marks line up, I can think of better paces to use that money. As for Brent not liking to have to modify new parts that should be made correctly to start with, I agree, but find it curious that he doesn`t seem to mind having Scat FE crankshafts that require oddball crank keys, or cutting down rocker stands to use TFS heads.By comparison, a few minutes to make an ATI balancer work seems pretty minor.