290hp slant you tube Video

That's a pretty decent cam! I guessing you've got a fair bit of work in the head and the car is more of a track type deal? I run a solid [email protected] with 550 lift but it's a street car at 273CI. It likes 40mm chokes - they might be worth a try on it later if you are racing it and turning enough rpm but I think the 1.7" valve will hold you up more than the 38mm chokes.
Didn't notice any fuel leak in the video - unless they were referring to the fuel vapour coming from the carb throats but that's normal.