Hay erik I just searched the web for some flow # on the dart iron eagles s/s and the vortec heads. And the vortec out flow the dart iron eagle s/s. here are the numbers Vortec int 239 exh 162 and the dart iron eagle s/s int 210 exh 139. so I don't think his heads are running out of steam at 4500 rpm with those numbers .
http://www.chevyhiperformance.com/te...98/index4.html


Here's the site I found the numbers on.