would be mean as, easy cruising, and as you say, better drags
fully manualised C4 with a "converter brake" i think they're called? (diverts hydraulic pressure so you can launch hard or somethin.....)
would be mean, C4s are strong as a mofo when modded. Standard I dunno, my brother lunched a couple in his XD with a factory C4 and 302clevo, then again, it took a beating to do that (1x factory box, 1xfully rebuilt-) 3rd box is still holding up to my knowledge....
do it man, if nothin else, it'll be faster on the strip, esp with the power you're running