sliding tranny back to repair flexplate ?

[blazer2007]

I,ve seen the threads for sliding tranny back with 6 inch bolts for sliders but as a worst case scenario could the bolts get snapped off in the block or would the bolts just bend. I don,t mean tranny falling out but just the weight if tranny leaned forward or something like that. Some used 4 bolts and some just used 2 on the bottom. Just wondering if this a safe way to do this