'72T spark plugs

[donk]

I tried searching on this, but couldn't find the specific info I need. I want to give the recently acquired 911 a tune up, so I ordered the basic maintenance kit from our host. I was looking through the list of parts on the online tracking system and noticed that the spark plugs included with the kit are not the ones listed for my car in the main catalog. The catalog lists part number W3DPO for a 72-73 T, but the ones that I am being shipped are part number W5DC. The catalog says these apply to a 68-71 T.

I'm guessing they are a standard replacement that is substituted because of the hefty price difference (the W5DC are $1.85 each as opposed to $13.85 each for the W3DPO). I just want to make sure that I will be fine installing these plugs.

Thanks

[donk]

anyone know anything about this?

[RickM]

From the Bosch Website (Vehicle Part Finder):

http://www.boschusa.com/AutoParts/PartFinder/partfinder.asp

[RickM]

Perhaps the W5DC is an alternative to the W5CC.

[donk]

Rick,
That is my assumption, but I was hoping to get some reassurance. Thanks for the reply.

[donk]

by the way, its a '72 with MFI. I had already been to bosch's web site and seen that application chart.

[RickM]

According to this chart they may not be interchangable....seems the "Thread Length / Spark Position" are different (1 mm vs 3mm). A call to Bosch is in order:

Bosch Customer Service:
888-715-3616
(Monday thru Friday 8:00 am to 5:00 pm CST;
for U.S.)

You have to let us know what they say

[donk]

So, tell me if I am reading that chart right. It looks like the only difference between W5DC and W3DPO is the different heat range, and that the W3DP0 is platinum. Am I off on something?