225 slant rebuild for more power

I agree AND the 225 is a low rpm engine anyway. (4-1/8 stroke) 4500-5000 and you're done.
There is s lot of info on slantsix.org sbout this.

Exactly. That's one reason why I think.....although I am going to do it, head porting isn't terribly critical. Sure it will add to......and Lord knows every bit helps, lol, but the long stroke lends itself to low RPM torque.