hello..thanks for comment,....I have found core shift and thin castings by using sonic testing on the 194 heads...and have even hit THIN walls working on old 194 round track heads....If I remember correctly, you have seen this yourself, right?
i have seen less core shift on 230-292 heads...the 1's I have cut up have thicker castings too.....but i am sure core shift occurs in all these castings
