Curious, but why are you using 1964? Project 64 works better and as far as I know has cleaner emulation. I'd also consider either using Jabo's or Rice's current plugin.
There's only one way I play Kirby, and it's with this configuration taken straight from my list. For me, the game is near flawless.
Suggested Emulator: Mupen64
Suggested Video: Glide64 v0.8 Wonder
Alternate Video: Jabo's Direct 3D8 1.6
Suggested Sound: zilmar's Audio Plugin
Suggested RSP: RSP Emulation Plugin Made by: Jabo and Zilmar
Although this is a 1964 forum, Mupen64 is the ONLY emulator that will give you the missing graphics in the HUD. Here is Kirby for me with Mupen, Glide, zilmar audio, and RSP:
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