1.88 j heads then your probably stuck around 360-380 NA hp with moderate cam and Cr, 325 wheel hp is probably around 400-425 hp crank. Now if you port you might get close.
We shall see, I’m dumb enough to embark on all this. I am putting in alittle more cam after race day in October. As far as my J heads they are 2.02 and I did spend a number of hours porting them to get to the current 293whp it’s at now.