3995647AP Pulley Application

[Fast67VelleN2O]

I tried using the search on this site but haven't really been able to nail down if this was an actual asembly line installed part or a servie replcement piece. If this was actually used on the assembly line, what year and application was it used on?
Thanks
Matt

[JRSully]

I "think" that is a service replacement part for the 70 6060AP W/P pulley that was on all BB 70 solid lifter assembly line, could be wrong though

[Ls6 Ragtop]

Matt, 71 Chevrolet parts books list this pulley for the 71 LS6 Chevelle engine, of which no known documented cars have surfaced? I always wondered if any 71 Z28's might have used these as I know that 70 Z's have been known to have either the 69 824 pulley or the 6060. Maybe some 71 Z owners can enlighten us on this. Otherwise my guess is it ended up a service piece replacing the 824 and 6060.
Chris

[SSRSBOB]

What is the typical factory installed WP pulley on the 1970 L78?

Bob

[JRSully]

popular opinion is the 824 on early 70 L78's and the 6060 after the LS6 came out