New Best on Friday Night!

That was a great run and an excellent 60'! What distributor/ignition and timing are you running? Ended up at 38* total on my HEI and a narrow jet spread (68/73) on my 770 street avenger carb. My MPH is around 89 with an almost identical build as yours. JY 5.9.
I tune mine with a Wideband. Takes a lot of the guesswork out.