We've got an older site with significant link equity. It 301 redirects to our current website, passing all traffic, link value, etc. The 301 redirects have been in place for several years. Since the original redirects were setup, the current website has acquired massive link equity above and beyond the redirects.
I am considering removing all the 301 redirects and bringing the old site back to life (same URLs, content, design as before). I would also keep the current website live as is. The goal is to capture more SERP visibility by having 2 website "brands" in the same market.
Will the old site regain it's former link equity or will we effectively be starting from scratch?
In other words, does Google consider how long 301 redirects have been in place?