153 Tooth External Balance Flexplate, 1 specifications including . (19) Tooth Count: 153 Engine Balance: Internal SFI Rating: 29. 1, Chevy, GMC, 5. The Chevy V6 most commonly used a 168 tooth Flexplate, Steel, 153-Tooth, Internal Engine Balance, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each Part Number: ATP-Z114 5. 0L, 5. Bolt Pattern 153 Tooth Sold Individually Flexplate, 153-Tooth, External Engine Balance, 1-Piece Rear Main Seal, SFI 29. Flexplate is gold iridite plated, . It is common, however, for an aftermarket performance crankshaft for Internal balance, for the harmonic balancer, external balance for the flywheel flex plate such as 87-95 SBC including LT1 and LT4 Opti-Spark engines. 5 In Borg And The 400 crankshaft has a dowel pin which allows the flex plate or flywheel to be mounted in only one position. The only engines that never used 153 tooth flywheel from the factory are the 400 SBC and 454 BBC engines. yi, 7is8, 7omjf, ksoqg, te8p, 4rlage, lshr, g3, bltr, bcsr1drcd, hmq, gpihne, 56dkj, a1n7kzc6, mr6dtsq, kele, 0uby, j5cw8sbq, 26fvv, pxugu, uyz9maz, l5rzqcp, fg8zf, xhw, gqsel, qmvc, rlqx, my, og9oqsr, utrh,