Yes, 66 and newer have the normal LA bolt pattern size and angle.
Pretty much any dual plane small block LA intake will work. The factory 273 4 barrel intakes were single plane but worked just fine and are not too hard to find. I would steer clear of the large port 340-360 manifolds. They will work but not as well as one designed for a 273 or 318 with smaller ports. The old LD4B was a good one but are now harder to find and spendy for a nice one.