I've had great luck with Redline RL600 DOT 4, it has a 600F boiling temp.
If Redline made a 5.1 I might switch to that.
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https://www.TheFoat.com/92GTA
1969 Pontiac Firebird w/BP 461ci stroker kit, 670 heads & XE274H cam. Primer black with black interior.
1992 Pontiac Trans Am GTA w/SLP Performance Package. Dark Jade Grey Metallic, grey leather, T-Tops.
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