Issue is cyl wall thickness. With boosted motors, more wall thickness is better. You can make up the displacement much more easily with boost.
That isn't to say it cant be done, and depending on the power levels you want there are a lot of options.
If looking for torque, I'd say look at a LSX block (I went 427", but 454" fits your theme better), and run a positive displacement blower (Whipple, KB, Magnacharger, etc).
Biggest concern will be hood clearance I'd say. I know first gen Camaros with blowers sometimes have issues with stock height cowl hoods but it can be done (drop engine mounts, etc). Not sure what issues Chevelles have.
Sounds like a cool project!
William
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Texas A&M BSME 2008
1969 Camaro - Hugger Orange
1969 C10 SWB - Hugger Orange
1992 Corvette ZR-1
2021 Ford F250 Tremor
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