A car buddy of mine has a turbo 350 behind a 350 small block. He wants to raise the shift points under part to medium throttle. Can this be done and if so how is it done?
Thanks.

 

Yes it certainly can be done.

Is this a completely stock THM350?
Does the engine build a good 15"+ of vacuum at an idle?
Still using a stock valve-body, vacuum modulator, and governor?

Most rebuilt THM350 transmissions now have a vacuum modulator that uses an adjustment screw.
This is where you would start, to make your part throttle shift changes.

Full throttle shift changes are going to be based on how the governor is configured/ assembled.

 

If it has an adjustable modulator turn the adjustment screw in until it shifts at a higher speed.