Funny as I am using the Indy dual plane intake on my 63. My 493 is 10.6 comp and runs on 92 pump as its a street car. I use Indy EZ heads and make right about 600 hp. I am very pleased with it for the street driving as the driveability is great. It has let me hit 10.70's at 3700 lbs so far and that is using an 850 DP also. I feel with some tuning it has more in it. Dont know if I would go much faster with a single plane and I also have a problem with hood clearence. One of the guys on here told me that the MP 337 single plane intake should fit under my hood as its no taller then the Indy dual plane and I here the MP 337 SP intake makes good power. He also said I could use his Dominator carb with the 337 intake to see how my 63 likes it. I hope to take him up on it this year. I wanted to try the Victor or Indy single plane but they are to tall for my hood. And from what I hear the 337 intake is just as good or very close in performance to the Indy SP and Victor intakes. Ron