I have a 1970 Corvette orignally a 454 4-speed Coupe. Now has no engine and trans but I do have a 69 427 2 bolt and M21 Trans.. Casting on the block is 3963512 pass crank is 3804815 cast and heads are cast 3931063 from what I've found it is supposed to be a December 1969 block "LE" 335 horse 470 ft/lb pass car. I'd like to pull 45+ horse and 490+ torque out of it. Torque wouldn't be a problem but the HP needs big improvement. What might be my best options without a huge budget?? Any help would be great..