Hello theman1990.
We recently got one of our servers back up, that had all the TNX serial number data, and here's what I was able to find out for you.
Serial number: T-36604
Invoice Closeout date: 6/24/08
Description: Turbo, 60se-Sb-621-62-Gn0_63
Compressor wheel: 62-1 cast
Turbine wheel: F1-62 62mm
Journal bearing
Turbonetics .63 A/R Buick 3-bolt turbine housing
Should have an S compressor cover with a 4" inlet and 2.5" discharge.
Unfortunately none of those component level parts exist anymore.
The PTE alternative turbo would be either a Gen 1 PT6262 journal bearing with the SP compressor cover and .63 A/R PTE turbine housing.
Or a Gen 2 PT6062 dual ball bearing with the SP compressor cover and .63 A/R PTE turbine housing.
Those are available with a Standard or Heavy Duty wastegate actuator, or no wastegate actuator.
Hope this helps.
- Patrick