When you retorque, loosen the bolt apprx 90 to 120 rotational degrees then retorque to spec. That way you'll get an accurate retorque. As Blykins hinted, IMO you have about a 5% probability (very slight) that this will fix your coolant leak probs. Since these are original iron heads they could have been subjected to many machine shop/owner/jack leg atrocities over the years. Someone could have minutely busted into a water port during reckless porting or you could have a crack that's causing the leak. I would have the head(s) pressure tested before they went back on. Pay particular attention to the cylinder sidewalls in the lifter valley area of the block. That's a weak spot for OEM FEs (freeze busting). A dye penetrant check of that area wouldn't hurt either. This is all assuming you don't find anything with you head gasket inspection.
Rick, you need to stay up a lill' later in the evening (old fart syndrone) so you can sleep a little later in th AM..
Dave