That is a great looking Suburban!! Love it! I would probably just drive the wheels of of it
I also have been contemplating making the swap to LS,but have decided to keep it mostly original with exception of a disc brake upgrade and the 5 lug swap. The engine in mine came out of a '69,but I have the original on my engine stand and will be tearing it down over the winter.The cam wore down the first 3 lobes so the previous owner pulled it but never got around to fixing it. I will get into that once I get all the new stuff in the front end of my '68 and find out if I can save it.I am still hoping to get some more miles on it before winter.