dry/wet return

replacing an oil fired peerless JO steam boiler with either a burnham megasteam 396 if the customer stays oil or possibly a burnham independence ( 5 section) if they decide to convert to gas. i'm fine with either choice as i didn't have a strong argument to ditch the oil and i'm an oil guy at heart anyway. (I picked the independence due to the 2" steam supply tappings. can anyone recommend something else?) anyway, the reason for this post is the return configuration. currently ( and i didn't measure because this stuff only comes to you as you drive away) currently the 2 mains ( one 2" and the other 1-1/2") tie together near the boiler water line. I know it should be below and maybe it is by an inch or so. there is nothing i can do to get to this piping and make it right and im worried that the new boilers' water line will be lower making what was possibly just barely a wet return into a dry return and possibly creating balance issues by exposing the mains to each other. not even sure if raising the boiler on several blocks will get it high enough. SO.... is the middle of the glass enough below the water line to tie those mains together? that is likely the best i can do. there is no way to get them all the way to the floor. the diameter of the entire return is 1" and it does go to the floor, but all the way at the boiler. about 30 feet of it hovers near the water line. how big of an issue is this? i think i'm rambling....