whos to say what the correct geometry is??? i have found no ill effect of a socalled short rod ratio and never any differents in power. i have heard dwell intake charge etc etc. it's just not there this is my finding of yrs of building engines and dynoing for every last hp. this isn't just me but many many pro engine builders same findings. give sonny or grumpy, david reher a call and get the same answer. there's just nothing there. it's one of those myths that got out of hand and everyone thinks there is some magic number.. what is the socalled magic number ???? because i and a bunch of us can't find it..