leigh1322

Help please: Limited documentation available.
Trying to figure out which crankshaft pulley a 71 LS6 should have:
5-3/4 inch 3899660 BM cast iron L88??
6-3/4 inch 3863108 BM cast iron 427 69e?
6-3/4 inch 3921923 stamped steel 427 69L? LS5 454?
Anyone know?
or know where I could turn for the correct #?

TimAT

I just looked a the GM Parts catalog-- '71 Y (454) W/SP HI PERF 3863108 2 Groove Cast.
No info on diameter or anything else.. that's right from the GM catalog. Hope this helps. And it was $57.75

leigh1322

Thanks.
I'm glad you had a parts catalog.
And I wish I could go back in time and still get it for $57!!!

TimAT

LOL-- there is a very big list of parts in there that I'd go buy for the prices listed-- And those are retail prices if my memory is correct.

3X2

If I'm not mistaken, 454's have a counter weighted balancer and flywheel. So this rules out any 427 balancers. Unless your engine has been previously internally balanced for using non 454 balancers and flywheels.

62corvette

I am pretty sure he was asking about pulleys rather than balancers.

3X2

DOH!! that what happens when one tries to read the forum on a cell phone.