Ok what are your opinions? If installed a roller motor in my 89 Burb think I would see a MPG increase? I'm thinking about going back to driving my burb, make it a little more capable a little better hauler and drive it and sell my 2wd. I have access to a stock roller 350 that I would swap my heads and intake onto and drop in the burb. Thoughts on doing this? Be worth the time you think? Figure I could port and polish heads a little bit while I am there, try and get a little more flow, maybe slightly stronger springs for when she sees upper RPMs.