need a half second

I have to agree with the comment of your 60 foot time, that is excellent. What is your mph? What tires are you using? I say it would be easier to go faster with more cubes, but I understand wanting to max out your present motor. It makes for great bragging rights. How much does your car wiegh? As well could you please share with us your suspension specs? My car is a 1973 Scamp with a 340 from a 1970 Duster with 3:91 gears. The car wieghs just over 3600 lbs. with me in it and does a 1.96 60 foot time with Mickey Thompson S/S Indy Profile soft compound G 60 14 tires. As well I run a 904 transmission with a B&M Holeshot converter. My best 1/8 et is 8.78 at 86 mph. I am running an old Holley Streetmaster single plane intake. I bought it years ago based mostly on cost. It was on sale at the time and the Edelbrock LD 340 had just been discontinued, so I couldn't find one. I was wondering if I replace this intake with the new Air Gap intake what could I expect. Thanks for any help from forum members.