355 Record timing belt age?

My car was badly neglected by its previous owners. And while I've allowed it to sit, that's over! I've got the lift and ac in my garage, and I'm working on clearing the maintenance backlog.

To that end, I checked out the service records that came with the car. They are sparse, but it appears my timing belts were last replaced 4-5k miles ago... in March of 2002. So in a few months I'll be able to buy them a drink. I also have a four-cylinder Porsche, and on those, timing belts must be respected. I get that it isn't as big a deal on a 355 as on a 968, but 20 years? I'm curious if anyone has older ones. The service schedule doc was a little confusing, but it seemed like you wouldn't "ever" have to replace the timing belts, as long as you stay off dusty roads. (If yes dusty roads, inspect every 15k, replace every 30k, no time specified.)

My plan is to drive the car about five or ten miles, gently, once I have the brakes back on. Then I'll drop the engine and change the belts. Unless anyone wants to warn that I'm on borrowed time and better not start the engine again at all.

 

I was able to see “Ferrari,” “Dayco,” and “181610” (the part number) on one, and nothing on the other. That part number has been superseded, but I wasn’t able to find out when that happened. I do know that when the timing belts were replaced in 2002, it was at a Ferrari dealership.

 

I get what you mean, but I may have given a false impression. While the car has been sitting for two years due to bad brakes, the engine never went more than maybe three months without being started. It is most recently been started in the last week.