Edelbrock builds excellent FE Series aluminum heads, patterned after the 427 medium riser heads. Several varieties are available with different port and chamber options, including Edelbrock’s “pro-port” version, where a CNC porting program can be used to achieve flow numbers in excess of 370 cfm. 600-700 horsepower FE is readily achievable using these components, and 500 cubic inch engines over 900 horsepower are possible with the best components.