Yes, each top will sit on the other tub, it is the lift gate and tailgates that are the problem. With the CJ, you swing open the tire gate first, then open the lift gate (as it covers the upper edge of the tailgate) and then, if need, lower the tailgate down. The lock is on the lift gate as it "locks" the tailgate as well just by being shut. With the YJ, the tailgate swings out, not down because it has the tire bolted to it. Because of this, you can't open the liftgate first as the tire is in the way. So you open the tailgate/tire, then the liftgate (yes the lower section of the liftgate is behind the upper section of the tailgate and "locks" it in place when shut) The lock is in the tailgate of the YJ. Put one top on the other (without switching tailgates) and you have to play a synchronizing game of opening and closing 2 gates at a time.....royal pain! and it doesn't shut right. Keep CJ tops on CJ's and YJ tops on YJ's....
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon