I have gapless rings, Good question on the crank, The block is for 2 piece seal but how do I tell if what the crank has.

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65 Mustang convert. Mexican block 302 stroked to 347 with Edelbrock RPM heads, Comp cams #35-518-8 roller cam, victor intake Holley TBI commander 950-21s fuel injection system with forced induction by Novi 2000 supercharger and bottle fed NOS up to 350 ponies.