Thats scarey. The piston is in contact with the piston at 10*ATDC using checking spring. I can not feel it in the breaker bar as im barring engine over, but i can not open valve at that point by hand with that rocker, thay are tight together. I think it would be a good idea to replace the 1.65 intake rockers with 1.55's to be safe, what do you think. I didn't want to pull the heads to check this time. I only use the clay method while engine is on a stand. Thanks