well here is a video of my first try with the 426 stroker 505hp 564 tq , changed pistons heads and intake after this run , then i put the engine on a stand and put the 450hp 340 back in the car 8mpg at $8.20 a galon was killing me 120 miles a day hurts the wallet . Will put the 426 back when it is done up right skip video to 5 minute mark