So far, all of my HSAB's have been the same. I have tried .033's, .036's and now the .039's.

""I'm also experiencing lean out at medium acceleration"".

What front pump cam and squirter combo are you running?
I am running red/.037 on the front and that gives me the mid 13's from cruising speeds to medium accel.

My 60-75mph is 3000rpms to 3600rpms.