Supercharged111
Truly Awesome
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No lope, my 93 Z28 sounds like a truck. It has stock manifolds, dual 2.5" to 3" y pipe, and a bullet muffler dumped at the axle. It does idle around 800 RPM though, probably sound a bit different down in the 500-600 range. Too wide an LSA though for any lope, the stock cam sits on a 111 LSA. LT1 used 2 different cams. The information is getting harder to find, I believe the LT4 website that seems to no longer exist broke the cams down by year. Looks like a 241 cam is the early cam for the splined opti. The later vented optis were driven by a longer pin on the cam. The difference in lift and duration is negligible, but the LSA and ICL changed too and I'm having trouble getting good repeatable numbers on that. Late LT1s were rated 10hp higher but also had dual cats, so who knows where the extra hp came from. IMO you're splitting hairs trying to decide which stock LT1 cam you have, as long as you have ~.450" of lift it's not a B body cam and you will see a difference.
https://www.enginebuildermag.com/1999/09/rebuilding-the-chevrolet-lt1-engine-2/
https://www.enginebuildermag.com/1999/09/rebuilding-the-chevrolet-lt1-engine-2/