I am running a 511/tf 270 combo with a 5 speed. But I am using a proform 1050/4150. I think you about ar the limit for taking advantage of the 270 heads with a hydraulic roller. I am running a 265/269 .660 on 108 solid roller.
I do have to be going 75 mph to use 5th gear. But it’s not a big deal. I have 4.10 and a 30” tire. So I don’t much need the overdrive. The car has great street manners for a 750hp engine. I put 800 miles on it this summer. The gas mileage is terrible. And it does buck a little trying to idle through a parking lot. But it’s completely maneagable. It is a blast to drive.
This illustrates that what’s perfectly streetable for one person, may seem totally unacceptable to another.
The OP sounds like he has other cars and has a feel for what he wants. He’s the only one who can really assess what’s acceptable for him.
He should just build it the way he wants.
If it doesn’t meet his expectations...... well, that’s how you learn.
