After sending emails out to alot of engine builders i seen referanced on this site, got to talk to a few on the phone, I decided to build my 428 with a stroker kit to a 489. We have to local shops, both come highly recommended. And both told me that with the Torque and HP that a 489 will put out that i run a risk of wiping out my M20. Three questions, 1st is this the case? can the muncie not handle it? 2nd Is it a wise choice to build up a 428 or should i just buy a new block and build from there? and lastly what are the draw backs to this engine. If you need specifics of the build i have most of the information just dont know what you need to answer the questions.