edelbrock heads on a 318

Before I Start I Would Like To Say A Big Thank You To Everyone On Your Feedback About The Eddy Heads. My Knowledge Is Is No Were As Deep As Yours, Thanks Because I Really Do Need Your Help. Iam Felling A Little Mixed Up About All Of This. The Advice That You Guys Give Me Is Different Than The Eddy Guy At Edelbrocke. My Engine Was Rebuilt Last Year It Is At Zero Deck With Flat Top Pistons. Mopekid Said That These Rpm Heads The Ports Are To Big And The 202 Valves Are To Big To Keep Good Velocity At Lower Rpms. Everyone Says That It Is To Much Of A Head And To Much Flow For The Little 318. If You Go To The Eddy Website I See That The Eddy Heads With The 202 Valves Are On The Ford 289 And The 302. The Chevy 302, And 327 Also Run The 202 Heads. Except For The 327 Which Is Only 9 Cubes More Then The 318, Why Does In Work Onm The Brand X Engines But Not The 318? Thanks To All You Guys For The Information, I Will Now E-mail Edelbrock Armed With Some Great Questions About There Heads. Eddy Says Tha T There Heads Part 60779 Works On The 318,340,and 360. I Will Ask Them All These Questions (1) Will I Lose Combustion Efficenty With The Change To Aluminum. (2) How Will The Heat Loss With Aluminum Effect Performance.(3)will The Compression Ratio Drop Useingthese Heads With The Stock Flat Tops.(4) You Say That These Heads Work Well For The 318,340 And The 360, But Are The Ports To Big For The 318.(5) Are These Heads To Much Flow. (6) Are The 202 Valves To Big To Keep Good Velocity At Lower Rpms, And Will Gears Like 410s Help Solve That Problem. (7) Will I Need To Ru N Higher Compression Pistons With These Heads. I Will Ask The Guys At Edelbrock All These Great Questions That I Got From You Guys, If There Is Anything That I Missed Please Let My Know, I Will Post There Responce On This Website. Thanks Again Guys, You Have Been A Big Help Later Newatthis