Never went with the T56. Real life got me. I'm either going to boost this LT1 to the moon, or drop a 5.3L LS based motor in from a newer GM truck. I'd kind of like to go the boosted route. a turbo charged LT1 should be good for almost 450rwhp if built right. And I love boost, so efficient! Though I'll likely only make about 400rwhp. If I do turbo this year it'll be a rear mount setup replacing the muffler with a turbo and piping the intake charge back up the car. Most of those setups are putting about 380rwhp down on a stock LT1