my question is which steel crank to buy . Internal or external balance ? Eagle or gn1. And also do I keep it stock stroke or go with a stroker kit . This would be for a 4.1 block . Fully ported gn1 heads 6870 turbo 215/220 hyd roller cam . & also Do the stroker set ups still rev as quick as the stock stroke motors . I'm asking bcoz I gotta replace my crank & im trying to figure which direction to go . Thanks for all your help guys.