I don't think a 235 will get that high, but a 250 or 292 might. Check Out Leo Santucci's Chevy Inline 6 Power Manual for info on making a high performance 6.
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'50 Chevy Fleetline DeLuxe ('55 235)
'48 Chevy Fleetmaster coupe ('60 235)
Chicago
http://www.geocities.com/hellfish122