Quote Originally Posted by Dave Severson View Post
Pat--Thanks! our discussion around here was on the "easier on parts aspect of the 4-7 swap, but the small gains in hp are always welcome, seem $30.00 is cheap to improve both!
yep all my custom grinds are 4/7 as they get used in max effort engines .a very small amount of more money . if it helps with bottom end parts crank then its worth it to us.one of my customers been using a 4/7 for many years with 400hp of Nos .crank is not the top of the line but allways checks out great .the 8000 + rpms and the Nos as well. i would of bet it would of been busted in two parts many years ago i can not say its only the 4/7 swap but for the price its a no brainer