Very, very nice! I would keep the burb original... they are so rare, everybody expects a 350 small block, etc. Need to show young folks old can be fun too!
In no way shape or form would I even consider a 350 (for the reasons you mention). I have no problems with others doing that but it is not for me. The question really is leave it "as is" and drive it or do a complete restoration to original specs (like I did with my 1/2 ton).
