500cfm or 650cfm carb for stock 302 with headers?

[68ford]

well my demons been great for me, angles mine spudders a little and all the jumping and high speed stuff i do its just like a holly, works great.i litterally havent touch mine in 2 years since the new motor, and on the old motor,took it right out of the box,set iddle speed and never touched it again,iddle air was even good right out of the box. did you try spring loaded needle and seats? people put those in hollys and i dont know if demon comes with or without them, never had any reason to look inside or take mine appart to see. are you comparing a center hung float demon to side hung float holly? that wouldnt be fair if thats the case, ive heard that makes a big difference.

 

[mtkawboy]

http://www.swcp.com/~dilts/mustangs/holley_4180/index.html BMC69, heres a good article on those carbs