If your 65 block is cast prior to August then its the "Fang" block. The cylinders can be opened up to .125 beyond 427 bore. Its a keeper.
August 65 on, the block had the same casting number for some unknown reason but lost the thick cylinders and the fangs.
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"Knowledge is good" Emil Fabor
67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold)
70 L/78 Nova M-21,Black Cherry,Sandalwood Int.
09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red.
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