The gas leak I had was between the gas block and the gas tube not between the gas block and barrel. That is still a press fit and gas tight. Last week end I bored out the end of my gas tube and soldered in a brass bushing. I machined out the I.D. of the bushing to be a zero clearace to the gas block nose. I now requires a few taps from a hammer to get the gas tube in place. That should stop the gas leak there. Ther other thing I did was remove the L1A1 flash hider and built a Krinkov style booster/gas accumulator to hold the gas pressure up a little longer. I also bought a yugo rpk barrel which is about 4" longer that the standard AK barrel and am going to install that along with the Krinkov booster/flashhider cone. Hopefully I can try it this week and will post the results.
I may need to install a roller on the hammer cocking hump on the bolt carrier as there is some resistance when the hammer is pushed to the re-cocking position as the bolt carrier rides over the hammer.
Thanks for the advice. Any advice is welcome.