Hi bud , what engine is it? . Usually when the belt snaps your valves will impact your piston's in one form or another and sadly this usually results in bent vavles and the least . Worst case damaged pistons ,vavles,guides,head,ect ect . obviously in this case the top end is effectivley scrap . On a mass produced engine it's usually easlier and cheaper to replace the whole engine .Cheers Al .
ps If your feeling lucky replace the belt ,take the plugs out and turn it over by hand . se if theres any compression .