Re: How many 8.1L/496's out there?
DirtyLarry, you are the man! Thank you very much for the information. Yes, I first came across the L21s in the GM Electronic Parts Catalog (that is where I started thinking it might be possible for me to get C-O-P on my L29), my research shows them to be C-O-P in 1999 & 2000, carrying the RPOs L21 & LP4. In 1998 the EPC shows, 366 (LS0) & 427 (LR0) V8s with distributors...I would presume them to be the fuelie versions of the classic tall deck BBCs.
From what I can tell I need one of the L21 cam sensors, crank sensor, and reluctor wheel. Don't remember, might need L21 timing cover. I am bundling this with an 0411 PCM swap, btw.
Looks like I'm on the hunt for some 2-year only valve covers, sweet, I love rare parts.
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Devin
1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt
1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050
1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350
My Introduction with my '83s History
New Daily, the '96
Last edited by 83GMCK2500; 04-19-2014 at 02:52 AM.
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