Actually need dimensions!
Here's a link to "most" CS144 service pulley dimensions. There are others:
http://store.alternatorparts.com/cs1...r-pulleys.aspx
Here's what these people consider a replacement for the GM 10498550 that is used on the LT5. Are the dimensions correct? I've never measured one to confirm. Haven't needed one.
http://store.alternatorparts.com/sea...?find=10498550