I've been looking for the balancer and holdown plates, but can't find them in my garage or storage area. Unfortunately, all of my car stuff is in shambles since I haven't done any work on my car since I've gotten sick. Sorry I can't t help you.
Motor is original 389. Rebuilt in 2008 with 8,000 miles since then. Added #s matching 4barrel. 400 Turbo with adapter. 3:08 Rear gear. Total original miles on car is 86,800. Plan on 4spd conversion if I keep it.