Help I am a real dummy when it comes to a North star 4.6 engine . I have the opportunity to purchase a 4.6 Nothstar Engine that I would use in a project sand rail . Where can I get information on what I should know about the vin# . Is there different performance 4.6 engines . What should I look for ? Any information would be helpful .

DOHC V8 Vin 9 (LD8)

* 300hp @ 6000 RPM
* 295tq @ 4400 RPM
* 3.66 inch bore, 3.31 inch stroke
* 10.3:1 compression ratio
* Aluminum block and heads

Cadillac Northstar 4.6L DOHC V8 Vin Y (L37)

* 275hp @ 5600 RPM
* 300tq @ 4000 RPM
* 3.66 inch bore, 3.31 inch stroke
* 10.3:1 compression ratio
* Aluminum block and heads

http://www.babcox.com/editorial/us/us100232.htm