Rubc555

Guys I need a little help here Please . L72. 427ci. 425 hp
I’m trying to find the correct pulley and my Corvette technical information manual judging guide is Very vague gives me a part number 3829193 but when I look it up states With PS this motor has no PS or AC
I found the right alternator but naturally it came with the wrong pulley.
Can some one let me know the correct part # and who may have it?
Thanks Guys

NightshiftHD

The original part number is 3829387 which is a 3-5/8" OD pulley. Get one at Paragon (1651) or CC (302009) for under $40. The part number you mention is the same OD but has the wider outside spacer for P/S. Bill

Rubc555

Thanks Bill but I’m confused bible says that’s for L79 350 hp

Rubc555

Bill what’s weird is the car came with that pulley but the wrong newer alternator..
This bible has me pulling my hair out .. LOL.

NightshiftHD

I believe this is (another) example of where the JG is wrong. Mine shows the same chart you posted.

However when I look in both of my Parts Books from the early 70's, they show the "193" pulley as a 63-64 F.I. / S.H.P only. Does not show the 193 pulley used after 64.

What both Parts books do show is pulley "387" that I mention used for L79's (as per the chart above) but also L78 (65 396) and 427's without P/S.

So that chart should show 3829387 pulley not only for L79 but also L36 and L72 without P/S (N40). Fyi Bill

Rubc555

Thanks Bill I’m moving forward on getting my first car judged and it’s all the little things that
Will eat you up.. so I’m told.. I will install the 387 back to its old home and keep my fingers crossed .. Thanks Again Bill you made this an easy fix.

NightshiftHD

If you get deducted on it (based on the JG), point them to any Parts Manual and that should be sufficient to dispute. Bill