I've been running A/C Rapid Fire platinum #7 in my 261 w/ HEI.
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Last edited by BC59; 04/01/2025 2:09 AM. Reason: pic
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022