Well we will see soon one thing i did not say was the motor was dynoed with old hooker headers that where 1 7/8 tubes in to 3 in collectors and a eddy performer rpm intake.! Now the car has 2" into 2 1/8 tube headers with 3 1/2 collectors and a mopar M-1 intake so when i get it dynoed again the numbers will show if it made a differance.!
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My 440 is making 580 hp & 600 ft tq with only 448 cid.! 
Stock crank & rods with KB pistons. Where i get my power is the Indy heads and TTI headers & comp solid lift cam.
doubt the TTI headers give you any advantage over any other brand of header. But I'm with you I have a stock crank/stroke 440 w/ ported Stage VI heads and a comp 588 solid roller making around the same #'s...maybe a tad more.
