http://www.amerspeed.com/scgi-bin/showultimaengines.cgi
Correction, the cheapest motor is 300hp @ $7500
The most expensive one is 800hp @ $32,000 (!!!!!!)
The Ultimate Smallblock Chevy Engine, 800 hp @6800 rpm, 650 ft. lbs. torque @4800 rpm, PBM aluminum block, dry sump, 15 deg. CFE aluminum cyl. heads, 12.5 comp., Pro Systems Track 1 carburetor