I missed the part about raising the rear end . I thought he was saying the taller tire would raise the rear…. So it depends on how you raise the rear end .
The question is “will your car be faster with the bigger tires?)
They will add rotating mass and the overall ratio of the rear gearing. Unless you are blowing the tires off you may actually lose some 60ft ??
Just thinking out loud here .
That would assume I want my bracket car to be faster. I've been losing a lot of rounds because of spinning on marginal tracks. It is never an issue on tracks with good prep. I will gladly trade a little slower for more consistent.