I have in hand a new 5.56 barrel from k-var and it is set up to use a 90deg. gas block. I have a AKM gas block and would like to use it. the rub comes in with the location of the gas hole on the barrel. if you look at the photos the hole ines up with the cross pin location witch is too far back. I could eather plug the barrel hole and use the gas block as a guide to drill a new hole, or do the reverse of what hcpookie did with his barrel/ GB. plug the "tube" of the GB and drill a new hole in the GB at 90 deg. and line up on the barrel this would require some fitting of the piston tube and a shorter piston ( not more than 1/16") to get the corect timing of the piston to GB. tell me hwat would you do and how.