My 2001 Alpine with 350 HP engine had 6 pin data ports. By the way there are only four wires used. If you don't want to pull the dash area, just go back to the service bay and look at your data port located at that location. As I'm sure you know, you can download the VMSPC program from the internet to you lap top, but you will need to purchase the Control Box and the Wire Cable from it to the the data port from Silverleaf. I have the control box to data port cable I took off my 2001, but you would still need the Silverleaf control box. PM if interested.
Don't know who you talked to at Silverleaf, but your incorrect about all Alpines having 6 pin data ports. When I got my 2004 I removed the Silverleaf Control Box and wire to data port from the 2001. When I went to reinstall my Silverleaf in the 2004 coach it had a 9 pin data port. I called Silverleaf and ordered a new cable for the 9 pin data port.
This is one toy I can't give up. WRV dash gauges suck!
2004 Alpine 40 FDTS