Interesting thread, as I'm contemplating a stock-appearing low-deck motor for a 4-speed '68 RR with 3.23s.
Along the lines of 400 block, Stealths, Perf RPM (logos removed), AVS2, stock exhaust, pan, air cleaner, maybe cam specs like GY3's.
Wondering what the "sweet spot" CI is for throttle response, street-range TQ, good vac signal for the carb...probably 470-505, ya think ?
Maybe even use the #s 383, though I'd rather drive the car while the "fun motor" goes together...