I am starting to build a 385 engine for my 1971 Torino GT. The engine will have Edelbrock heads, Pro-Flo 4 EFI, Comp Cams Xtreme Energy 218/224 Hydraulic Roller Cam and Lifter Kit, Hooker Full Length Headers with 3 inch exhaust and Scorpion Roller Rockers. The Torino has a 9 inch with 3:50 gears, F70 15 tires and an AOD transmission. I am building the car to run as much of Route 66 that is left from Chicago to San Diego and visit friends relatives in California and take our time coming back. The trip will probably last 4 weeks and cover about 5,000 miles. The reason for the roller cam and lifters is to make the engine as economical as possible on pump gas. I don't know if a 429 would be enough more economical than 460 to justify giving up the extra torque? The plans are to use a Scat cast crankshaft and stock rods and set the Rev Limiter at 6,000 RPM, but shift at 5,000 to 5,500 RPM. The block will have to bored ,03 over. Please tell what you think on 429 vs 460 and if possible recommend a CR and what pistons to use with the Edelbrock heads? I think even under the above perimeters it will be a good performing engine. Thanks for your help.