Over the years, I think ERA has fixed just about everything that I've found to complain about.
There are two things, though, that you may want to consider for your build. 1) If you have Bob make you a custom, removable, Turkey Pan, your life will be much, much easier as you deal with your Holley year after year after year; and 2) Servicing (primarily lubricating) the front driveshaft u-joint with the ERA outboard braked rear (fitted with the emergency brake) is tricky. In fact, at first you will think it to be impossible. Old Jaguars had a removable panel on the tunnel area adjacent to the front u-joint for servicing. That would be a nice, and simple, tweak. The Jags also had a little plug on their rear uprights to allow for a squirt of grease in on the rear hubs. ERA casts their own uprights, and I've often wondered why they didn't include the little plug that Jag did. Bob will probably say
"because it's not needed." But that would be really easy to add as well.