1/4 mile Shift Point

684door said

I go through at about 5000 to 5100 rpm. I just want to know if 5400 rpm is too much for a stock bottom end.

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toolmanmike had the most proper answer to your question. Nobody can say what the safe maximum RPM is for your engine. If somone says you should be able to shift at 6000 or 6200 RPM and it breaks a connecting rod at 5800 RPM you are going to be pissed off.
All anyone can say is what their experience with THEIR 383 proved. In my case, my first build was a mismatched 383, stock crank and rods, heavy TRW flat top pistons, Mopar .509 camshaft, single plane M1 intake, and 750 vacuum secondary carb. In my heavy car with automatic trans, I shifted at about 6000, and engine was up to about 6200 RPM before the shift was completed. Test yours as others have stated IF you are comfortable with the idea that anything can possibly happen.