440 overbore

.060" for early blocks, .040" for later blocks . If .080" is desired extra thick sleeves are required along with a filled block at least 1/2 way up , sleeved lifter bores . Stock eliminator motors require super precision machining and capable of revving to the moon . Example : C/SA Roadrunner 440 , burnouts @ 8,000 rpm , shifts @ 8,200 rpm , 5500 rpm torque converter stall . Not for the faint of heart .