I would stay away from 58cc heads if you are going to be 10.2:1 w/ a 61cc chamber. Many times though, the comp. ratios listed are higher than actual - probably so the manufacturer stays on the safe side of things. The only way to know for sure is to run a quick calculation. Determine the cc's of one cylinder, and divide it by the sum of the cc's of the head, valve relief, piston depth "in the hole" and gasket. In other words:
((bore/2)^2*pi*stroke)*cc conversion) / (valve relief cc + quench cc + chamber cc)
Assume a .030 motor w 3.400 stroke (i think that is the combo for a 347 - someone correct me if i am wrong)
4.030/2^2*pi*3.4/.061 / 4cc + 6cc + 61cc = 10.01:1
realize the above is a rough estimator - i've assumed a flat top piston w/ 4cc valve reliefs, the piston essentially at zero deck height, a .030" gasket, and .061 cubic inches/cc. Change the variables to match your situation and you should get a close judge of what your comp. ratio would be.
If you are fuel injected, a true 10:1 or a little more should not be a problem, assuming that you have it properly tuned. It is more difficult to avoid detonation on a hot day w/ a carbed set up. Definately check what the valve reliefs may be though - b/c i have no way of knowing what cc relief those pistons would have.