Worth the trouble?

If it was mine I would pull it apart and put in a set of h116cp pistons. I would keep the valves maybe mill the head a little. I think I would swap in a more modern grind camshaft like http://www.summitracing.com/parts/HRS-CL710581-10/ or a slightly milder cam http://www.summitracing.com/parts/HRS-710461-10/