I'm trying the Endurex in the 565 for my street car. No restrictors either. Wanted to get plenty of oil up top for extended street driving. This was the advice from my engine builder. Only dyno time on them so far.
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65 Lemans Street Car - 521, T400, 3.70 9". 10.13 @ 135. 3770 lbs. Drag Week ‘14, ‘15, ‘17
63 Lemans Race Car- 8.81 @ 151, 5.60 @ 123(SOLD)
67 Bonneville ragtop
74 Firebird - 455, e heads, TK0600 in process
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