Hey, I'm not the best at picking out carbs for engines, so I was looking for some help. I have a 406 with 10.43:1 compression with Brodix aluminum heads, roller cam .540/.556 lift and 234/240 duration at 50. I'm going to be using 100-150 shot of nitrous pumping race gas from a separate container. Power band ends at 6800 with a single plane weiand stealth manifold. This is a mildly used car. Driven maybe 4 times a week, mostly for race but would like street use as well. I was wondering what the best size carb would be for this application, and would a double pumper be more efficient or stick to vacuum?

I have a holley 750 vacuum secondary which I was using on my blower. Would I be able to reuse this? Thanks.

 

You could reuse that or I would definitely look into a DP, either 750 dp ro 850.

 

I would say 750 double pumper

 

def look into getting a dp, the vac secondaries are a pai imo...