factory mercury 420 big block 454, 400 hours, clean great running moter, factory roller rockers, holley carb, weiland intake, msd ignition with rev limiter, Stainless bypass, sold without exhaust. $3,000 or b.o., Also Have everything to build a matching second 420 except block and heads. 2- sets of gil exhaust with stainless risers with welded in mufflers. $1,800 for both sets very clean. 978-815-9586 or [email protected]