I just had my car dyno'd last friday and it's showing it's peak RWHP at 6250 RPM, peak RWTQ at 5750 RPM.
I still have a stock 4L60E, with TCI SF3200 and B&M 24k# trans cooler.

Off the dyno, the car typically shifts about 6100 RPM.
What should I set my shift points at to optimize on the HP/TQ peaks?
I remember reading like ten years ago that it should be around 200rpm after peak.... but I can't remember if it was HP or TQ.
Also, what is the highest recommended shift RPM for stock and aftermarket 4L60E's? Once this one goes, I'm looking at a FLP stage 4 trans.

Thanks all.

 

That's a bizzare torque peak.

If your dyno was done unlocked, your rpm range was skewed by the converter's slip and it is reading too high.

There is no problem spinning a stock 4L60e to 6500 which is about the safe limit of a stock shortblock.

 

Here's a few scans of the dyno sheets.
Granted I'm still running a full point rich on AFR...

 

I've never seen an LS1 make peak torque up that high. Maybe there is something about a mustang dyno. Anyways, you have a heads & a decent cam. You should move your shift points up to at least 6400 and maybe as much as 6600.