I was wondering what it would cost to rebuild a 1989 350 motor in a Sierra, 8 foot bed with extended cab. Also it was up in New Hampshire and has a really sad amount of rust damage and under the back seats are fist size holes. My dad told me the engine was way overdue for a engine rebuild if i choose to do that. Or I could get another complete 350 engine with very low miles. I will have more pics of it in a few days and as you can see in the pic. The cab corners are rusted and above the wheels are to, Worst of all is the frame where the gas tanks straps go is completely gone. So me and my dad will attach them to the bottom of the bed when we get new straps.