unknown 350 update
Thanks for the info. This engine will repower a 1986 C-10. The current engine has piston slap going uphill & smokes 1 qt of oil every 100 miles. Time for an engine swap. I've learned this block is one of the most common castings for the SBC's & is also known for it's desirable high nickel content. I bought the a fore mentioned engine after compression test & listening to it run for 10 minutes.