Edelbrock d64 dual carb '64 273 manifold

rumblefish360 is correct. 64 & 65 273 heads had the same "close to vertical" intake bolt holes. I measured ~16 deg off vertical on my 65. All 66+ LA heads had the same intake bolt hole (~45 deg from vertical). I recall it was also a bigger diameter bolt. I hope nobody buys this intake to machine it for 66+. It is worth much more to someone with a 64 or 65 engine. Mainly for historic reasons and to look cool. I doubt a 273 requires two 4 barrels, unless the smallest available (370 cfm).