Street 360 W/.528" P.S. Cam

That works for the basic parameters of a 10.5-1 to gnome and a decently well prepped head. AKA - ported. On or about but closer to under a 300 cfm head but better than a stocker. Giving that the narrow LSA is for the porter head flow on a street engine to aid in extra torque production, it’s a winner.

On higher performing engines, ones with a higher developed intake and exhaust system running much higher compression ratios and big valves that aren’t crippling to the CID of the engine, though on a wedge, that’s always the case, severity is the next issue, the case of a narrower LSA is ridiculous since your ignoring the lower rpm range and operating in a much higher one without care or concern to low rpm output. Mostly because, you’re never there except idling around the pits.

I have no experience how this would work or quite honestly feel on the street. The widest LSA I have used was a 112. I have no notes to compare it against a narrow LSA on the same engine size.