Deep Pulley Question for you '67 L78 Owners

[Chevelle SS 396 L78]

I've been researching parts for a build of an original '67 L78 block for my eventual clone build of original 1967 Chevelle SS 396 L78. It's been interesting researching the '67 L78 design and the appropriate part numbers and date codes for date correct engine build.


I actually have three questions for those of you who have or have owned L78 1967 Camaros:


1. Did your stock alternator from the factory (37 amp I assume) come with a deep groove pulley on it?


2. If your engine is still stock, whether original or rebuilt to stock specs, how does it perform on premium pump gas (91 to 93 octane)?


3. Any recommendations for an engine builder in central/sough central PA who knows the L78 engine thoroughly?


All input much appreciated,


John (in PA)