396 block/454 crank
std. bore 422 c.i. / piston dia. 4.094", 1.643" compression height
0.030" over 428 c.i. / piston dia. 4.124", 1.643" c.h.
0.060" over 434 c.i. / piston dia. 4.154", 1.643 c.h.