That would be a waste of the Colt slide, because the Tisas ASF slide is such a close copy already. What's
not a close copy is the slide on the RIA (Philippines) GI model.
Here's the result when I put a postwar Colt replacement slide on an RIA GI model:
View attachment 1262521
And here are all the non-authentic parts that had to be replaced on the RIA:
View attachment 1262522
In contrast, the only parts that had to be replaced on the Tisas ASF (for the sake of authenticity) were the grips and magazines (plus the firing pin and firing pin stop, because these, oddly enough, were Series 80).