With close consideration of my options i have decided to try to upgrade to a 488cc Fuiji block in my 88 indy 400. I have found a guy with the whole top end for a 488cc but he doesn't have the bottom end. I have heard it is possible to put a top end of a 488cc on the bottom end of my 398cc. Is this true?? Also, can i use the same coil, stator, cdi box, and wiring harness from my 398cc block??