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You're talking in riddles. I assume, that the
schematic as such is working, but possibly the part isn't behaving as expected with the external circuitry.
Real 74LS245 hasn't open drain outputs, so it can't behave identically. Actually, I don't understand why you are using open drain at all? For the same reason, I can't recommend a pull-up value.
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By the way, when I looking buses with the connected selector (EPM3064A) by oscilloscope, I'm visually see differents on both sides (data-bus in CPU side, & data-bus in common-bus side).
On the CPU<->EPM3064A side it's look (compared with side CPU-common bus) too tightened, when lelel goes from logic-zero to logic-one.
I hope it is because of too high resistance of pullups resistors. I try to reduse resistance of it.
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