Don't get me wrong, I have a new fire breathing 351 stroker almost ready to put in the truck. V-8's are great, but everything conceivable has been done to them. Nitrous, super charged, turboed, blah blah blah. The, in my case, 250 I6 is relitively new to me. So I am building something different. In order to build a 250hps 250cid engine, I need to learn as much as I can. Parts are not all that expensive a pretty easy to find. The V8 heads are E7's so I do see where the confussion lies. Take care, Ken