Weiand #8007 intake on a 273 (Several questions)

I know that the bolt holes need to be modified for this intake to bolt onto the 273. (Not my preferred way to do things), but I have a chance to pick up a used one for a 318-360 for 110.00. My engine is stock but soon to be adding headers, and a cam. The engine was completely gone through 19000 mi. ago. Top, and bottom. I also have an 8:75 rear soon to be adding 4:10 gears. I am also looking for carb. suggestions and am looking for a used one if possible. (Tight budget) Also will I have to get 4bbl. kickdown linkage or can use the current setup? The car is a 65 Valiant Signet. 273/904 Thanks in advance, Litz