"drop in" small block

Does a 318 have same motor mounts?
Im not looking for high hp. 300 hp maybe?? A 340 is too much $ plus I have one on a stand that needs a build (for the 69 vert)
I figured with the 2 sets of heads and 2 different intakes and using the "externals" from the 273, I may be able to get a "drop in" that gives me a 50+ hp increase over the course of a weekend.
I dont want to get into rebuilding a bottom end. Lack of room and take me 5 times the amount of time it should.
I hear you on the clutter too lol
Even if the drop in has correct oil pan, etc.., you'll still have the torque convertor fit issue.
Some will include motor mount bracket and convertor balance issues also.
Then the 273 and convertor you pulled becomes more clutter.