Thanks all fore your replise. I find it strange that summit say 600 cfm fore the 1970-74 buick 350 and 455. and the most of you see high cfm. part number HLT-0-80450. Thanks Koos.
Umm, Summit is anything BUT an expert on Buick engines... 350's make good use of a 750cfm carb, while the 455 from the factory had an 800cfm, after 1970 I believe.
