Sounds to me like you are trying to run a race car on the street.

locked timing, electric pump, etc.

A lot of things that make sense at the strip fail to make it on the street, which it looks like you are finding out the hard way.

35 degrees might make sense at WOT throttle but it doesn't make sense anywhere else.

At cruise you want more timing than that, which is why there is vacuum advance. Probably part of your running hot issue as well.